STORAGE & FREEZING: With Moin Minis sealing discs, breast milk can be stored leak-proof in NUK bottles and even frozen. ONLY THE BEST: for the little ones among us. The lids are of course BPA-free, food safe, absolutely safe, can be washed in the dishwasher and are suitable for microwaves without emitting harmful substances. ALWAYS AT HAND: Ideal for traveling and absolutely spill-proof, breast milk and other liquids can be stored in the fridge or freezer. FULL COMPATIBILITY: With the Moin Minis lids, various NUK baby bottles can be sealed spill-proof — the indispensable baby accessory.