Joseph Joseph | Nest Lock Storage Container Set | BPA-free Polypropylene | Multi-Colour | Set of 4 | Space-saving, nesting design Easy-find, snap-together lids and colour-coded bases Airtight, leak-proof and stackable lids Freezer, microwave and dishwasher safe (top rack only) BPA free. No need to worry about cluttered drawers and cupboards. This highly-functional container set takes the hassle out of organizing with its space-saving, nesting design and easy-to-find, snap-together lids and colour-coded bases. Plus, the airtight, leak-proof and stackable lids provide outstanding freshness and convenience, and are freezer, microwave and dishwasher safe (top rack only) and BPA free.