Black + Blum Stack + Nest Glass Food Storage Container Set - 600ml or 900ml - Black

Yes, the borosilicate glass is oven-safe, but you must remove the lid before placing the glass base in the oven.

Yes, when the locking tabs are fully engaged, the silicone seal creates an airtight and watertight vacuum, preventing leaks.

The lids can be used in the microwave for reheating, but you must ensure the clips are in the unlocked (open) position to allow steam to vent.

Simply grip the edge of the silicone seal and pull it gently out of the lid's circular track.

Yes, these containers are safe for refrigerator and freezer use, making them perfect for batch cooking.

Borosilicate glass is significantly more resistant to thermal shock, meaning it is less likely to crack when changing temperatures suddenly.

Ensure the silicone seal is pushed fully into the groove on the underside of the lid; a misaligned seal can prevent the latch from closing properly.

Remove the seal and soak it in a mixture of warm water and baking soda for 30 minutes, then rinse and dry thoroughly.

Use a small bottle brush to clean the locking hinges and the track where the silicone seal sits.