The Rubbermaid fg7f71retchil takealongs 2.9-cup square containers 2 pack is great for storing snacks for a car trip, your favorite dip for a party or your left over"s for tomorrow"s lunch. With the new quick click seal, takealongs lids click into place letting you know when contents are secured. The lids have ridges for easy stacking, and the bases have graduation marks for handy measuring. Safe to use in the microwave, freezer and dishwasher, the takealongs lid design allows you to worry about one less thing. If you hear the click, you know your seal is secure.