This hydration insulated water bottle by Built has been designed from BPA free stainless steel with a 480ml capacity, perfect for staying hydrated whilst on the go. Crafted with a double walled, vacuum-insulated body, this water bottle has been made from 18/8 stainless steel which insulates cold drinks for up to 24 hours & keeps hot drinks hot for up to six hours. The double wall design also means the exterior will stay a comfortable temperature to hold, while Perfect Seal technology ensures that the lid is leak-proof.