1,keep warm for long time 2, very cute, 3,suitable for the old and young 4,waterproof Weight: 1kg Color: Any color available Cubage: 42*40*31cm (full of water) Packing: 20pcs/ctnV=220v, P=500wMOQ: 5000pcsKeep warm about 2~10 hoursMaterial: Waterproof High quality, competitive price, safety different size and design we can supply.Customized logo is available.