Excellent heat retention capacity: Our hot water bottle has good airtightness and good heat retention capacity, allowing the thermos to keep warm for more than 8 hours. Strong heat retention capacity can provide continuous warmth. After 5 to 6 hours, the surface temperature of the thermos can still be maintained at 40C.Large capacity: The hot water bottle measures 32 x 20 cm and has a capacity of 2 liters. It helps keep you warm and retains heat longer than conventional rubber bottles. Made of soft knit fabric (gray), the cover can be easily removed and washed. .Durable and safe to use: Thickened PVC material and designed for explosion-proof protection, which can withstand more than 1000 lbs of pressure. Rest assured that you will receive non-burned, odorless thermoplastic material. .Pain Reliever & Essential Home Remedy: The hot water bottle provides well-being and comfort. It can also relieve a variety of symptoms such as joint pain and body aches caused by wet and cold weather. It also works as an excellent cold pack to reduce swelling and other conditions.