This Anchor Hocking True Lock leak-proof 6 cup glass food storage container has a state-of-the-art latching technology that clasps tightly onto glass vessels. Put them in purses or backpacks, lunch-bags or backseats. Stackable, nesting lids keep kitchen cabinets organized. Unlike most plastics and metals, glass is all-recyclable, won’t stain, and won’t retain odors. This item is 100% leakproof and dishwasher safe.