Features: Quality material,hot water bag make of quality rubber material, odorless, non toxic. hot bottle water bag is recyclable. compared to the rubber transparent hot water bottles, this one is more durable & longer lasting insulation. Safe and easy to use,first open the bottle stopper ,then fill two-thirds of 80 degrees of water into the rubber water bottle. finally, tighten the bottle stopper and turn the warm water bag upside down to check for leaks. Unique design, the special pattern design on the surfaces makes the hot water bottle for cramps safer and more comfortable. the hot water bottle only cover is comfortable and high-quality material, it can keep warm for a longer . Best assistant,hot water bags can be used for hot and cold therapies. hot compresses can relieve knee pains, back pains, menstrual cramps, cold hands and feet. cold compresses can relieve fever and cool down. Holiday gift,can be used as a gift of wife ,friend ,family , to give more warmth and care to them. Specifications: Material:Rubber Color:Pink,Gray,Black Note: Please allow 1-2cm errors due to manual measurement,pls make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1 Piece Hot Water Bottle with Cover