2pcs Cartoon Rubber Flannelette Hot Water Bottle Thick Hot Water Bag 350ml (Light Pink) Condition: Item Type: Hot Water Bottle Material: Rubber + Flannelette Capacity: 350ml Color: Light Pink Function: Suitable for keeping warm in winter, suitable for alleviating pain, heat and cold therapy, warm water bag can be used to relieve pain and sports injuries Single Size: Approx. 19.6 x 12.3 x 4cm / 7.7 x 4.8 x 1.6in(manual measurement, for reference only) Operating Steps: 1. Insert the bottom of the hot water bottle into the mouth of the cloth sleeve. 2. Close the opening on the back. 3. Fill in 2/3 of the hot water, please be careful when filling to avoid scalding. 4. Drain the excess air in the hot water bottle after filling the water. This step is very important, and the air must be squeezed out. 5. Tighten the nut with proper strength and do not use excessive force to prevent slippage. Precautions 1. When filling water, please hold the neck of the product vertically, add two-thirds of the water volume, discharge air before tightening the cap and check the tightness of the cap. 2. To avoid burns, it is recommended to put a cover on the hot water bottle, and the water temperature should not be too high, generally around 70-80 degrees, and it is not suitable to contact acid-base oil substances. 3. Before use, pay attention to whether the hot water bottle used is aging, whether there is any change in the thickness of the bag body, once there is the above change, it should be discarded to prevent over-age use. 4. The hot water bottle should not be punctured by heavy pressure and incisive objects. 5. Keep away from infants and young children when using hot water bottles. 6. Do not heat by microwave, avoid direct sunlight and contact with grease. 7. When storing the hot water bottle, drain the water and air in the bag and place it flat in a cool and dry place.