Compact And Solid, Convenient For Outgoing. Fixed Amount fill-Able, Instant For Making Milk When Outgoing. To Prevent Milk Powder From Spreading Out The Feeding Bottle. Unique Dividing Piece Between Layers To Avoid Leakage Of Milk Powder Or Smudge From The Milk Powder Remnants To Carry Bag. If Used As Small Bowls Or Storage Containers, It Can Enhance The Convenience To Bring It Outdoor.