Press N' Click's patented, easy to use "One Touch" Press mechanism makes food storage a breeze! This "Tritan Series" container set features extra clear & durable lids made of Tritan Plastic that have built-in Microwave Vents. They are both Air & Water Tight, keeping your food fresher longer without any unnecessary mess. All Press N' Click storage products are washable, feature Heat Resistant Handles to make carrying hot meals worry-free and are made from BPA Free virgin plastic. They are Microwave, Dishwasher & Freezer Safe and stack or nest easily on your counter or in your cupboard.