The containers are airtight, featuring a silicone gasket seal to keep food fresh and dry for longer periods.
They often use a "twist and lock" or "flip and lock" mechanism for easy one-handed access and secure sealing.
The clear body allows for convenient identification of contents.
They are typically made from BPA-free plastic and can be safe for use in the microwave, freezer, and dishwasher (usually with lids open/removed).