Behind Better Ice A deeper look at how GLAZER mini works

Preface

In this handbook, we'll walk you through every detail of using the GLAZER mini.

Chapter 1 covers how to use the product correctly and addresses common questions.

Chapter 2 helps you choose the right water source—turns out, mineral water is one of the best choices for clear ice and the tap water could be the second.

Chapter 3 explains how different temperatures affect the freezing time and the resulting ice clarity. These are general guidelines; actual results may vary depending on your environment.
Finally, Chapter 4 provides the theoretical foundations we found behind the clear ice-making process.

Troubleshooting

1. Why is the top part of my ice missing?

• Reason: The mold wasn’t completely filled with water.

• Solution: Insert the mold into the liner more gently.

2. Why does my sphere ice look like an egg?

• Reason: The mold was pressed too tightly into the liner, causing deformation during freezing.

• Solution: Gently place the mold into the liner, avoiding pressure.

3. Why are there needle-like bubbles in the ice?

• Reason: Water with very low ion content and impurities provides no nucleation sites during freezing, resulting in uncertain freezing patterns.

• Solution: Use water with slightly higher ion concentration, such as tap or mineral water. Avoid purified or distilled water. (See Chapter 2 for details.)

4. Why are there clear bubbles in the ice?

• Reason: As the temperature drops during freezing, the solubility of gases in water decreases, causing bubbles to form. Some of these bubbles don’t fully escape the mold.

• Solution: Try setting the freezer temperature higher to allow more time for bubbles to escape before freezing completes.

5. Why is the bottom of the ice cloudy?

• Reason: Bubbles tend to gather around the vent at the bottom during the freezing process.

• Solution: Make sure the vent path is clear and freeze at an optimal rate to allow gases to escape.

6. Why are there tiny holes around the base of the ice?

• Reason: The air bubbles were not fully released through the bottom vent holes. Since our mold freezes from top to bottom, the air releases as the temperature drops and moves downward, but is blocked by the mold walls.

• Solution: Keep your freezer at a slightly higher temperature and avoid any vibrations.

7. I can't pull the mold out of the liner.

• Reason: The mold was pressed too tightly into the liner, causing deformation during freezing.

• Solution: Gently place the mold into the liner, avoiding pressure.

8. How do I use the plastic cup (liner)?Can it be reused? Is it sold separately?

• Solution: Use one, keep the other as a backup. Yes, it’s reusable. You can order extras from our store.

Chapter 1 - How can I select my water type?

Based on tests conducted on dozens of water sources, we have found that water with a TDS level between 30–50 mg/L tends to produce significantly clearer ice. Water with TDS levels either above or below this range typically results in less transparent ice.

From our experience, we can infer that mineral water, filtered tap water, and some municipal tap water often fall within this optimal TDS range and are therefore more likely to produce clear ice—though actual results depend on the specific characteristics of the water source used.

Purified water, due to its extremely low ion concentration (always 0), often leads to the formation of needle-like air bubbles within the ice. Conversely, water with higher ion concentrations can cause the bottom of the ice block to appear cloudy.

In the following section, we compare the effects of different TDS levels on ice clarity and outline the patterns we have observed.

Purified water - A | TDS 0

Purified water - B | TDS 10

Mineral water - A | TDS 34

Mineral water - B | TDS 44

Mineral water - C | TDS 52

Tap water HK | TDS 59

Mineral water - D | TDS 119

Mineral water - E | TDS 176

Mineral water - F | TDS 231

As shown in the image series, we conducted sampling tests on water sources with TDS levels ranging from 0 to 230 mg/L. These sources included distilled water such as Watsons, purified water like Bonaqua, and a variety of mineral waters with increasing ion concentrations—including Fiji, Evian, VOSS, Acqua Panna, and Dasani... The trends we observed were as follows:

At TDS levels of 0 and 10 mg/L, needle-like air bubbles appeared within the ice. As the TDS increased, these bubbles became less pronounced and eventually disappeared. At a TDS level of 34 mg/L, only minimal bubbles were visible in the ice sphere. When the TDS fell within the 44–59 mg/L range, the ice spheres became fully transparent. Beyond 100 mg/L, the bubbles reappeared in a more granular form, resulting in a cloudy appearance. Among the mineral waters tested, Evian had the highest TDS value.

Our findings confirm that while we recommend using mineral water with an appropriate TDS level to produce clear ice—especially given its compact volume, which makes it ideal for freezing multiple ice shapes even in smaller freezers—mineral water is not the only viable option.

Properly filtered or naturally balanced tap water that falls within the optimal TDS range can also produce crystal-clear ice, making it a practical and accessible alternative for many users.

In the next section, we will explore how the choice of water impacts freezing speed and structural integrity of the ice.

Chapter 2 - How long should you leave the mold in the freezer?

Freezing time is often considered the most critical factor in making clear ice, and the primary variable that directly affects freezing time is the temperature of your freezer. In this section, we will detail the approximate time required for completely freezing a clear ice ball at various temperature settings and demonstrate the resulting ice clarity achieved under each condition.

Please note: The water used in all tests within this section has a TDS of about 40 mg/L. And the initial temperature is room temperature.

In -25°C | Takes 16 hrs

A little cloudy at the bottom.

In -20°C | Takes 24 hrs

Almost clear with some needle liked bubble.

In -15°C | Takes 30 hrs

Super clear

In -10°C | Takes 36 hrs

Super clear

In -5°C | Takes 42 hrs

Super clear

Under optimal water conditions, it has been demonstrated that the lower the freezer temperature, the slower the freezing rate and the longer the total freezing time—resulting in better ice clarity. With the exception of ice frozen at -25°C, which showed visible accumulation at the bottom, ice produced at other tested temperatures exhibited high transparency.

To further explore how ice forms inside the GLAZER mini, we conducted a time-lapse study of the freezing process at -15°C. This investigation revealed that the volume of crystalline ice grows progressively slower over time until full solidification is achieved.

Let’s take a closer look at how clear ice develops during the freezing process.

Time Lapse of mineral water (TDS 40)

After 12 hrs

Ice begins to form on the top surface, with internal sheet-like crystals growing downward.

After 16 hrs

Outer surface solidifies; more sheet-like crystals form and start to intersect.

After 20 hrs

Upper part fully freezes into a solid dome; the bottom starts to freeze.

After 24 hrs

Bottom surface flattens and begins to protrude downward.

After 27 hrs

Still requires more time to fully freeze.

After 29 hrs

Ice completely forms.

This naturally led to the question: how does the freezing curve differ for water sources with significantly lower or higher TDS levels? To investigate this, we conducted additional tests using purified water (TDS 0) and Evian mineral water (TDS 230).

Using the same methodology and freezing conditions, we recorded their freezing behavior and outcomes. The results are as follows.

Time Lapse of purified water (TDS 0)

Time Lapse of Évian mineral water (TDS 230)

Chapter 3 - Technical Reasons.

In this chapter, we will explore the reasons behind the observed phenomena related to ice formation. By referencing third-party literature, we aim to support our experimental findings with external evidence. The discussion will include: why changes in TDS levels lead to corresponding changes in the outcomes, and why the transparency of ice varies with different freezing temperatures.

How TDS Works – A Balance Between Nucleation Promotion and Crystallization Inhibition

The relationship between total dissolved solids (TDS) and ice formation follows a characteristic inverted U-shaped curve, governed by the interplay between thermodynamic and kinetic factors.

At low TDS levels, dissolved ions (e.g., Ca²⁺, Mg²⁺) and particulate matter (e.g., CaCO₃ microcrystals) act as heterogeneous nucleation sites, significantly reducing the activation energy for ice nucleation. These sites facilitate ordered molecular alignment at relatively mild supercooling conditions (e.g., –5°C), in contrast to the homogeneous nucleation in pure water, which typically requires extreme supercooling (~–38°C).

However, at high TDS levels, the system exhibits crystallization inhibition due to several mechanisms:

Freezing point depression (Tf=Kf·m) increases supercooling depth, inducing stochastic nucleation and leading to polycrystalline and turbid ice.
Viscosity rise, as predicted by the Debye-Hückel theory, restricts molecular diffusion to the growing ice front, reducing crystal growth rates and increasing inclusion of liquid entrapments.
Hydration shell formation around ions (e.g., Na⁺, with a hydration radius ~3.6 Å) disrupts the hydrogen bond network, suppressing directional crystal growth and promoting dendritic defects or amorphous regions.

Thus, TDS influences ice clarity and microstructure through a balance between nucleation enhancement at low concentrations and crystallization retardation at high concentrations. The resultant ice quality is determined by the competition between nucleation thermodynamics (G) and kinetic barriers (diffusion, phase separation), explaining the non-linear trend observed.

Glazer Mini Classic Cube

I came across this product from an ad and decided to give it a try. These molds are significantly easier to use than any competitor’s products and they yield perfect ice every time. I also do appreciate that they send extra liner cups too. Great product!

Pedí 3 y ahora he vuelto a pedir otros dlos, creo que eso es lo mejor que puedo decir de estos artículos.
Son cómodos, al estar de pie ocupan poco espacio y se desmoldan co facilidad

Seriously. How often is it that a purchased product does exactly what it says it will? This one actually does! Amazing. A bit delayed delivery but all is forgiven!

Easy enough for daily use

I did not want something I would only use on holidays and Plastic Liner for GLAZER mini x 5 has been fine for regular use. Quick to fill, easy release, and the ice still looks impressive.

Roomy enough for big ice lovers

If you like a serious cube in the glass, Plastic Liner for GLAZER mini x 5 delivers on presence. It looks substantial, melts in a way I like, and the mold is manageable.

Helped me level up iced tea

Iced tea looks surprisingly nicer with Plastic Liner for GLAZER mini x 5. It is a small visual upgrade, easy to repeat, and I have kept using it all summer.

Nice weight and feel in hand

Plastic Liner for GLAZER mini x 5 feels well made when you handle it. Not too flimsy, not awkward to fill, and the finished cubes look uniform.

Good for gifting with a bottle

Pairing Plastic Liner for GLAZER mini x 5 with a bottle was a hit. People get the point immediately, it looks premium, and it is useful beyond the first week.

Works for mocktails too

For non-alcoholic drinks, Plastic Liner for GLAZER mini x 5 still makes everything feel more special. The ice looks great in colorful mocktails and it is easy to keep on hand.

One of my better recent buys

I was curious whether Plastic Liner for GLAZER mini x 5 would really make a difference and it actually does. It has been easy to use, the ice comes out looking sharp, and it feels like a nicer option than the usual freezer tray setup.

Good for batching before a party

Before hosting, I can prep Plastic Liner for GLAZER mini x 5 ahead and not stress day-of. The ice holds up fine for what I need, looks great in pitchers, and guests comment on it.

Makes drinks look way better

Picked up Plastic Liner for GLAZER mini x 5 because I wanted cleaner-looking ice at home and it absolutely delivered. The mold is easy to fill, the ice comes out looking great, and it instantly makes iced coffee or a night drink feel a little more put together.

Good for people who notice details

If you are the type who notices details in a drink, GLAZER Press: Reshape Ice, Reshape Moments. rewards that. Subtle upgrade, not loud branding.

Quiet improvement to routine

It is a quiet improvement to my drink routine. GLAZER Press: Reshape Ice, Reshape Moments. does not demand attention, it just works.

Works with my usual freezer temp

My freezer runs a bit warm sometimes and GLAZER Press: Reshape Ice, Reshape Moments. still froze reliably enough for me.

Helpful for mocktail nights

Mocktail nights at home feel a notch nicer with GLAZER Press: Reshape Ice, Reshape Moments.. The ice reads clean in colorful drinks.

Good value if you use it weekly

If you will use it weekly, GLAZER Press: Reshape Ice, Reshape Moments. feels like fair value. The per-use cost is low and the enjoyment is consistent.

Glad I did not overthink it

I almost overthought which mold to buy; GLAZER Press: Reshape Ice, Reshape Moments. ended up being a simple choice that worked.

Handles flavored syrups well visually

Even with flavored syrups, GLAZER Press: Reshape Ice, Reshape Moments. ice still looks neat in the glass instead of turning the drink into a murky mess right away.

Simple and effective

GLAZER Press: Reshape Ice, Reshape Moments. is one of those products that just works. It is straightforward to prep, the result looks clean, and it has been a solid little improvement for everyday drinks. Shipping was smooth and everything arrived in good condition.

Practical for everyday drinks

I wanted something practical for everyday drinks and GLAZER Press: Reshape Ice, Reshape Moments. fits that role. Simple to use, decent results, and I have kept reaching for it.

Good everyday companion

GLAZER Press: Reshape Ice, Reshape Moments. became a normal everyday companion in my kitchen, not a special-occasion-only tool.

Not a gimmick in practice

I worried GLAZER Press: Reshape Ice, Reshape Moments. might be gimmicky but in practice it is just useful. Looks better than average ice and stays easy to use.

Less fighting with stuck cubes

I used to fight stuck cubes daily. GLAZER Press: Reshape Ice, Reshape Moments. reduced that annoyance a lot.

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Behind Better Ice A deeper look at how GLAZER mini works

Preface

Troubleshooting

1. Why is the top part of my ice missing?

2. Why does my sphere ice look like an egg?

3. Why are there needle-like bubbles in the ice?

4. Why are there clear bubbles in the ice?

5. Why is the bottom of the ice cloudy?

6. Why are there tiny holes around the base of the ice?

7. I can't pull the mold out of the liner.

8. How do I use the plastic cup (liner)?Can it be reused? Is it sold separately?

Chapter 1 - How can I select my water type?

Chapter 2 - How long should you leave the mold in the freezer?

Chapter 3 - Technical Reasons.

How TDS Works – A Balance Between Nucleation Promotion and Crystallization Inhibition

GLAZER mini | Take ICE Easy!

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