Set of Two Blue Sandwich Keepers Each measures approx 5.5" x 5" x 2" Dishwasher Safe - BPA Free Protect your sandwich from the rigors of everyday travel in your backpack, briefcase, purse, or lunchbox. Tupperware Sandwich Keepers - Set of 2 Blue. Each Keeper features a hinged clamshell design with a snap lock closure. Made of BPA free plastic it measures approximately 5.5" by 5" by 2" and will protect your favorite sandwich from the rigors of daily travel in a backpack or luch box. This handy sandwich keeper is dishwasher safe for a green alternative to plastic bags!