[U-SHAPED HOT WATER BOTTLE WITH COVER]-- This U-shaped water bottle is made of flexible rubber with a fleece cover, making it comfy to wear. It can hold 1L of water, but we recommend that you fill it only 2/3 of the way full. This will help prevent water from spilling out and gives the water room to distribute as it's being used. [WARMTH FOR PAIN RELIEF]--Using a hot water bottle or bag for pain relief is a common remedy to alleviate aches in your neck and shoulders. The shape helps you easily mold the bag to where you need it most,Treating sore muscles, cramps, arthritis, aches and pains, migraines, stiff necks, lower back pain, menstrual cramps, stress and slight injury detumescence. [DURABLE AND ECO-FRIENDLY]--The bottle is under Safety Standard for hot packs for pain, meaning it is leakproof and durable. The bottle and cover are vegan friendly and baby and kids safe. CAUTION: an adult should always supervise and never fill with boiling water. [EASY TO USE]--Wide mouth design, fill the water bottle more easily,and reduce the risk of burns. Strong screw cap ensures no water leakage after tightening.When you're done using the bottle, drain it completely and store it in a cool, dry, dark place until you need it again. [CHOICE FOR WINTER]--Best warm choice for winter travel, camping, hiking or other outdoor activities, protect your hands or other exposed skin from frostbite. Comes with a soft hot water bag cover to prevent direct skin contact with hot water bag to cause burns.