Nest Storage is a 6pc compact storage container set. The problem with most sets of storage containers is that they take up precious cupboard space when not in use and usually require lids and bases to be stored separately. This can make pairing the corresponding elements a real hassle. This innovative, space-saving design neatly combines the bases and lids for six sizes ofstoragecontainer in the same space as one. Bases nest neatly inside each other and lids snap conveniently together making them very easy to find - and all elements are clearly color-coded for speedy pairing. When closed all containers are airtight. All elements arefreezer, microwaveanddishwasher safe. Lids are dishwasher safe on top rack only. BPA-free. Care & Use: Before using in a microwave, remove lid and place loosely on top of container do not close lid. Use caution when removingcontainerfrom microwave as it may become hot during heating. To prevent staining avoid using with strong colorants such as turmeric or tomato-based sauces. Not suitable for use in ovens or under grills.