Feature: 1. Rubber & flannel material: The cloth cover is soft and smooth, and feels comfortable; the inner rubber material is strong and durable. 2. Safety: The hot water bottle is pressure-resistant and explosion-proof, no need to plug in, double-layer leak-proof, warm and anti-scald. 3. Multifunctional: The hot water bag dissipates heat slowly, keeps heat for a long time, and can also be used as an ice pack or a cold water bottle. Note: Not suitable for microwave heating. 4. Usage: Hot water bottles can be used as hot or cold compresses. Hot compresses can relieve knee pain, back pain, menstrual pain, and cold hands and feet. Cold compresses can relieve pain, sports injuries, reduce fever, and lower body temperature. Attention: Different computers display different colors, the actual color may be slightly different from the above picture. Thanks for your understanding. Color: S1/S2/S3/S4/S5/S6 Material: Rubber+Flannel Number: EC0477 Size: As pictured Capacity: 2000ml Due to manual measurement, please allow 0.5-1 inch error. Packing includes: Hot water bag*1pc (Random Color) or Cloth cover*1pc