Come and see our amazing products. Hot water bag is made of high-quality PVC material, odorless, & Non-toxic. Yuo can open the cap, then fill two-thirds of 80 degrees of water into the rubber water bottle. Finally, tighten the cap and turn the warm water bag upside down to check for leaks. Good gifts for women. Pls confirm with us about the packing info, stock color and exact production time before placing your order.