From Joseph Joseph, the Nest Lock 20-piece Food Storage Container Set, BPA-free features: The problem with most storage containers is that they take up precious cabinet space when not in use and usually require the lids and bases to be stored separately - which make finding and pairing both elements a hassle. With the unique design of Nest Lock, container bases nest neatly inside each other and lids clip conveniently together for efficient, space-saving storage. As each element is color-coded too, it's very easy to match lids with bases when you need them. All containers feature lockable, airtight and leakproof lids and are: Plastic Space-saving nesting design Easy-find, snap-together lids and color-coded bases Airtight, leakproof and stackable lids Freezer, microwave, and dishwasher safe (top-rack only) Before using in a microwave, remove lid and place loosely on top of container - do not close lid Use caution when removing container from microwave as it may become hot during heating To prevent stains, pitting or other problems associated with high temperatures, avoid overheating foods high in oil, fat, sugar or strong colorants, such as tomato Not suitable for use in ovens or under grills Overall dimensions approx. 9.08" H x 6.5" W x 8" D Each approx. measures: 2 x 0.9 US cups (230ml) 9 x 7 x 3.5 2 x 2.2 US cups (540ml) 8 x 5.5 x 3 2 x 4.6 US cups (1.1L) 7 x 5.5 x 2.5 2 x 7.7 US cups (1.85L) 6.5 x 4.5 x 2 2x 12.5 US cups (3L) 5 x 3.5 x 1.5 Approx. capacity on each container: 2 8-oz 2 18-oz 2 37-oz  2 63-oz 2 101-oz Imported.