Color-coded 12-piece storage set makes organizing a snap! Stop searching for the right-sized lid. Each storage container features a colored dot— just match the base with the lid for easy usage. Lids are equipped with easy-pull tabs and airtight silicone locks to seal in freshness. To store these space-saving containers, just snap the lids together atop the nesting bases. Set includes a lid and base of each size: 8 oz., 18 oz., 37 oz., 63 oz., 101 oz. and 152 oz. Freezer-, microwave-, and dishwasher-safe BPA-free polypropylene.