Now you can easily vacuum out the air and seal in freshness with this amazing set of food storage containers! Simply press down on the lid to vacuum out the air and seal in freshness. Each container has a built-in date dial on the lid, and adjusts in height to fit your needs perfectly! Set includes 4 containers and 4 lids that nest together for compact storage. BPA-free plastic. Dishwasher safe. Each container is 4 "Dia. and expands from 4 3/8"H (25 oz) to 7"H (50 oz). 8-Piece Set.