Easy to use: The wide-mouth hot and cold thermos is easy to fill and use. The heat pack used to relieve pain is multifunctional. Use the hot water bottle for cramps, neck and shoulder pain, medical use, during pregnancy, or as a foot warmer.Description:Item Type: Flush hot water bottleColor: Blue , RedMaterial: Silicone, KnittedSize: 5.7*3.5inchCapacity: 300ML , 600ML , 900MLKeep warm: warm your hands for 2 hours, warm the quilt for 6 hoursUses: Hand warming, belly warming, leg warming, pain relief, neck and shoulders, etc.NOTE1.For manual measurements, please allow an error of 0-3 cm. Please check the size and color before purchasing2. Please note that there may be slight chromatic aberration due to different monitors, please understand