Rectangular food containers with an airtight seal to keep pantry, fridge and freezer items fresh Built-in leak-proof seal* for mess-free storage; ideal for taking with you on the move Stackable and nestable design for compact and efficient space saving Sistema is the 1st food storage and reusable bottle brand partnering with Terracycle. Recycle your old containers for free in 3 simple steps, visit to find out more. Safe to use in the dishwasher (on the top rack), the microwave (without the lid), or in the fridge and freezer