The problem with most storage containers is that they take up precious cupboard 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 products in the Nest™ Lock range work together so you can build your own collection to suit your needs, whether it be for fridge/freezer storage, batch cooking or family lunch boxes. All containers feature lockable, airtight and leakproof lids. Lids and containers dishwasher safe (top rack only). Microwave safe (for reheating purposes 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. Polypropylene 90.0% Silicone 10.0%. Contains: 1 x 0.9 US cups (230ml), 1 x 2.2 US cups (540ml), 1 x 4.6 US cups (1.1L), 1 x 7.7 US cups (1.85L), 1 x 12.5 US cups (3L) storage containers with lids. 7.9" x 9.7" x 6.4"