Momcozy Portable Bottle Warmer for Travel – Dual Heating Modes for Breast Milk & Water, Portable Milk Warmer with Fast Heating & Long Battery Life, 17 Ounces Large Capacity, Purple

There's a couple different ones out there, this is the one I was referring to. It has a temp setting which is super helpful and it makes it easy if you leave the house. https://a.co/d/0fHMAhj2