The Ultra-Seal™ 3.1 Cup Rectangle food storage container features a green color-coded
matching system to help find the correct lid and base combination without rummaging
through the cupboards. The gasket and four latches in the lid create an airtight and
watertight seal that keeps food fresh and prevents liquids from leaking. A vent in the
lid releases steam when the container is placed in the microwave, and all containers
store efficiently both when in use and when not in use. Ultr-Seal™ containers are freezer,
microwave and dishwasher safe, as well as BPA-free and phthalate-free.