OXO Good Grips LockTop Container, 20-piece Set, White Lids Multiple inner locking tabs create an airtight, watertight seal Tritan material resists warping, staining and orders Crystal clear body and transparent lid make it easy to view contents Freezer, microware and dishwasher safe Bpa-free-free Multiple inner locking tabs create an airtight, watertight seal Tritan material resists warping, staining and orders Crystal clear body and transparent lid make it easy to view contents Freezer, microware and dishwasher safe Made from BPA-free material