100% airtight and leak-proof guaranteed - airtight leak-proof seal and innovative latches to help prevent spills and keep food fresh Modular design stacks perfectly to one another to save space and stay organized in pantries and cabinets Crystal-clear, BPA-free Tritan lids and bases feature 360 degree clarity Stain resistant material keeps plastic food container looking like-new and resists odors Bases and lids are dishwasher safe; 12 Cup is ideal for storing sugar