This has only been used a handful of times to heat water only for formula on the go. Washed with fragrance free dish soap. Chargeable, original charging cable included. From Amazon: 【Anywhere milk ready】You may make your formula with warm water anywhere. No matter water or milk, it can be warmed in BOLOLO portable milk warmer easily. It can be held with travel bag or stroller 【Fast warming in 5 mins】BOLOLO portable water warmer could heat up the water or milk in 5mins from room temp to 104 fahrenheit. So the baby could have the milk quickly while in the outside 【Super fast charging】With our super charging power adapter, the BOLOLO portable milk warmer could be charged in 2 hours to 100% or 80% in 1 hour. And it could support your whole day outside travelling 【Stainless steel No odor】We use stainless steel as the inner container but NOT plastic, so it's safe and no odor completely. You don't need worry about the smell or heath risk of any plastic bottle 【Accurate temp control & display】You may control the water/milk temp with every degree precisely. And it'll display the current water/milk temp with LED. It's super easy to use and get what temp you want