Store & Serve / TruGlass / Storage
Zero plastic
Store it, stack it, heat it.
- High borosilicate glassAbsorbs sudden temperature swings of up to 180 °C.
- StackableThe jars stack on one another to save shelf space.
- Silicone-rimmed lidShields the glass and stays flexible even at -40 °C, so it opens easily.
- Glass and siliconeA glass jar under a tempered glass lid with a silicone rim. Zero plastic.
What it is made of
Two parts, zero plastic.
Just glass and silicone: a high borosilicate glass jar and a tempered glass lid with a silicone rim, airtight, and made to stack.
01Glass container
High borosilicate glass, lab-grade 3.3. It handles -40 °C to 500 °C, absorbs a sudden 180 °C change, and its scratch resistance protects it from everyday kitchen bumps.
02Silicone-rim tempered glass lid
Airtight, leak and odour resistant. The silicone rim shields the glass and stays flexible even at -40 °C, so the lid opens easily. Take it off for the microwave and the oven.
The temperature guide
Cold storage.
Hot meals.
High borosilicate glass, made for both.
Choose a temperature to see what stays on
and what comes off.
OVEN COOKING GUIDE
160–260°C
High borosilicate glassFreezer
Keep tomorrow’s meal ready.
Store with the lid on. High borosilicate glass is rated down to −40°C; the everyday freezer guide point is −18°C.
- Lid
- Lid onTruGlass Jar
- Glass
- High borosilicateLab-grade 3.3
Fridge
Fresh today. Ready for later.
Keep the lid closed for airtight storage. The glass and silicone go into the fridge together.
- Lid
- Lid onTruGlass Jar
- Glass
- High borosilicateLab-grade 3.3
Microwave
Lid off. Warm it through.
Remove the jar’s lid before heating. The 100°C marker is a heating guide point, not a microwave setting.
- Lid
- Lid offRemove before heating
- Glass
- High borosilicateLab-grade 3.3
Oven
Let the glass take the heat.
Use the glass jar on its own, with the lid removed. Oven cooking guide: 160–260°C.
- Lid
- Lid offTruGlass Jar
- Glass
- High borosilicateLab-grade 3.3
Cold limit
Made for the deep cold.
The glass is rated down to −40°C. The silicone lid rim stays flexible in the cold, so the lid can still be lifted off.
- Lid
- Lid onTruGlass Jar
- Glass
- High borosilicateLab-grade 3.3
Heat limit
500°C. For the glass itself.
This is the glass material’s upper rating, not a cooking recommendation for the assembled jar. Remove the lid for oven use.
- Lid
- Lid offTruGlass Jar
- Glass
- High borosilicateLab-grade 3.3
180°Cthermal-shock resistance
The glass can handle a sudden temperature change of up to 180°C. This describes the temperature difference, separate from the −40°C to 500°C material range.
The TruGlass difference
A clearer comparison.
Three glass types. Six differences.
Every detail, at a glance.
Swipe to compare →
| Material | TruGlassLab-grade 3.3 · High borosilicate | Standard glassLow borosilicate | Regular glassTempered / soda-lime |
|---|---|---|---|
| Boron content | High · ≈12–13%Chemical stability | Low · ≈4–5%Weaker structural link | None · 0%Unstable under heat |
| Thermal expansion× 10⁻⁶ K⁻¹ | Ultra-low · 3.3Zero thermal stress | Medium · ≈5.0Expands under high heat | High · ≈9.0Rapid expansion; cracks easily |
| Surface hardnessMohs scale | High · ≈6.5Resists sink & flatware impacts | Medium · ≈5.5Rough scrubbers can scratch | Low · ≈4.5Scratches easily; may turn cloudy |
| Shatter profile | Predictable cracksClean, manageable breaks | Standard fracturingMedium-sized shards | Explosive shatteringBreaks into micro-fragments |
| Primary use | Lab & premium kitchenwareBuilt for extreme conditions | Low-cost storage jarsLightweight pantry use | Windows & beverage bottlesSingle-use or cold contents |
| Heat tolerance | Freezer-to-oven versatilityHandles sudden 180°C changes | Limited heat toleranceThaw slowly to room temperature | High thermal riskRisk of thermal failure |
TruGlass temperature ratings
Can it go in the microwave or oven?
Yes, the jar can, up to 500 °C in the oven. Take the lid off first.
Can it go in the freezer?
Yes, down to -40 °C. The silicone rim stays flexible, so the lid still opens easily.
Is it dishwasher safe?
Yes.
Do the jars stack?
Yes. They stack, to save shelf space.
What is the lid made of?
Tempered glass, with a silicone rim that shields the glass and stays flexible even at -40 °C.
Is there any plastic in it?
No. It is glass and silicone only: a high borosilicate glass jar, and a tempered glass lid with a silicone rim.
Why high borosilicate glass?
It barely grows as it heats: about 3.3 millionths of its size per degree, against roughly 9 for ordinary soda-lime glass. That is how it takes a sudden 180 °C change, from the freezer to the microwave or the fridge to the oven.
