I wish you a happy life and all the best. If you have any questions, please feel free to contact us by email and we will give you a satisfactory answer.GREAT GIFT CHOICE - The perfect Birthday or Holiday gift for friends and family, ideal for keeping you cosy at night or quick pain reliefProduct name: water injection hot water bottleMaterial: high quality silica gelColor:as pictures shownSize volume:300mlTechnical Parameters :Injected Volume : 3/4Water Temperature : 80C / 176 F or soInjected Volume while heating : top up with cold water （3/4）Heating Power : shall not exceed 1500WHeating Time : not exceed 3 minutesSoaking Time : 2-3 hoursWater Injection Steps :A. Place the hot water bag into the knitted cover.b. Add 80C / 176 F hot water into it and keep 3/4 full.c. Eliminate excessive air and firmly tighten the lid.Note: The actual color may be slightly different from the picture due to the difference in the reflected light on the display or during shooting. Finally, thank you again for visiting our shop.