Roundlock
A round glass container with a clear lid: see what's inside without opening it. Secure airtight seal, easy to open, from the fridge straight to the table.
- Body in heat-resistant borosilicate glass (−40 °C ~ +560 °C)
- Lid in clear tempered glass: see the contents without opening
- Silicone-coated One-Tight cap: airtight seal yet soft, easy opening
- From fridge/freezer to microwave, oven and dishwasher
- Flat lid: stacks neatly and stable, and is ready to serve at the table
See everything, without opening
The clear glass lid shows you at a glance what you're storing, without having to open it. So you can keep your food with complete peace of mind.
A secure seal, an easy open
Roundlock closes airtight yet opens with a soft motion: the silicone-coated One-Tight cap delivers a reliable seal that anyone can open with no effort.
One-Tight Cap design
A single closure that seals the whole rim firmly.
Silicone coating
The silicone wraps the lid for a soft, long-lasting seal.
Effortless opening
It closes securely, yet lifts open easily for anyone.
From fridge to table, one single container
Store, reheat and serve all in the same container. Roundlock goes from the refrigerator and freezer to the microwave, all the way to the dishwasher.
Designed to serve at the table, too
No transferring to another dish: bring Roundlock straight to the table and use it just as it is. The flat lid makes stacking stable and keeps your pantry impeccably tidy.
Ready to serve
No transferring: from storage to plate, all in one.
Stable stacking
The flat lid lets you stack the containers without wobbling.
Neat and tidy
A more organized fridge and cupboards, with everything perfectly lined up.
Pick the right size for every use
A range of sizes designed to be handy at every moment of the day. Choose based on your needs. (Sizes may vary slightly.)
Dried fruit, yogurt
The compact size, ideal for snacks, dried fruit and yogurt.
Sides, salads
Perfect for side dishes, salads and single portions.
Main dishes
For one-bowl meals, preparations and more generous leftovers.
Ready to serve
An elegant round shape, made to arrive straight at the table.
A safe glass container
Food-grade glass: use it with complete peace of mind. Roundlock passes international quality and safety tests and certifications.
Why choose Roundlock glass
Were you looking for the perfect container for storing and serving? Here it is.
Plastic
Light, but it holds onto odors and stains and dislikes heat.
Steel
Sturdy, but it doesn't let you see the contents.
Ordinary glass
Hygienic, but not very resistant to temperature shifts.
Roundlock
Heat-resistant, clear, airtight glass that's ready to serve.
Heat-resistant borosilicate glass
Roundlock combines a body in heat-resistant borosilicate glass with a lid in high-borosilicate tempered glass and a silicone cap: a combination that handles extreme cold and heat with no trouble.
Heat-resistant
A body from −40 °C to +560 °C: from the freezer to the oven without worry.
Odor-free
Glass doesn't absorb odors or flavors: every food stays just as it is.
Hygiene & cleaning
A smooth, non-porous surface: it washes easily, with no effort.
Key features
Usage compatibility
| Fridge / freezer | ✅ Yes. When freezing, fill only 2/3 of the container. |
|---|---|
| Microwave | ✅ Yes — open the lid slightly before heating. |
| Oven | ⚠️ Glass body only: always remove the lid. |
| Dishwasher | ✅ Yes — place it in the top rack. |
| Boiling-water sterilization | ✅ Yes, compatible. |
| Lid (tempered glass + silicone) | Resistance from −20 °C to +200 °C. |
| Body (heat-resistant glass) | Resistance from −40 °C to +560 °C. |
Using the lid correctly
- In the oven, always remove the lid: use only the glass body.
- In the microwave, open the lid slightly before heating.
- Avoid heating for too long, and don't overheat with oil or butter inside.
- If Roundlock has been in the freezer, let it thaw at room temperature before using it in the microwave or oven.
Before you use it
- Wash the product with lukewarm water and a mild detergent before first use.
- Don't move the container by holding it only by the lid: the parts could come apart.
- To open, always grip the body with your hand.
- Hard impacts can break it: handle it with care.
- For washing, use a soft sponge or cloth.
- In the dishwasher, place it in the top rack.
- When freezing, fill only 2/3 of the container.
- Do not use cracked or damaged products.
- Avoid uses other than those indicated.
The marks on the bottom are not a defect
The faint wave-like marks visible on the bottom arise naturally from the glass-pressing process.
Information
| Name | Roundlock |
|---|---|
| Material | Round heat-resistant glass body · Tempered-glass / silicone lid |
| Thermal resistance | Body −40 °C ~ +560 °C · Lid −20 °C ~ +200 °C |
| Sizes | Multiple sizes (see options) |
| Warranty | Within 14 days of receipt (product defects) |
| Shipping | Tracked international EMS from Korea |
| Payment | PayPal link, sent after your order |
Bring Roundlock into your kitchen
Storing well, every day, makes the difference. Add it to your cart: we'll send you the PayPal payment link and the EMS shipping details.