The Nest Lock 4-Piece Container Set from Joseph Joseph is a set of leakproof food storage containers, they have a space-saving design by stacking neatly inside each other when not in use which means it takes up less room in the kitchen! They have snap-together lids and stackable, colour-coded bases. Nest design Space-saving Airtight Leakproof lids Stackable lids Colour-coded bases Snap-together lids Freezer, microwave and dishwasher safe (top rack only) Microwave safe (for reheating purposes only) BPA Free Not suitable for use in ovens or under grills