NAME:1000ml 2000ml Portable Hot Water Bottle High Density PVC Keep Warm Hands Feet Female Belly Warmer Explosion-proof Hot Water Bags PRODUCT DESCRIPTION: Material:High-density PVC Size:Large2000ml(20x31cm) Small1000ml(15x24cm) Application scenario:Office, Living room,Bedroom,Outdoor etc.easy to carry Advantage: 1.The new material is not easy to age. The whole body of the hot water bag is made of high-quality PVC material. It can be disassembled and washed with double hands. 2.1-2 hours outdoor insulation, 3-6 hours at room temperature, lasting heat, 7-12 hours of warming the bed and warming the quilt. 3.The circular pattern design is used to make the heat dissipation uniform, reduce the contact area while preventing slippage, using a long lasting, hairy cartoon coat, high appearance level hot water bottle, provide comfortable temperature. 4.Wide mouth design & convenient water  funnel-type water port, intimate and humanized design, to prevent hot water scalding, and easy to change water at any time 5.Thread sealing & not easy to leak: The sealing adopts thread technology, dripping water does not leak, and has stronger sealing performance. It has passed multiple safety tests, anti-scalding and explosion-proof, and has good thermal insulation performance. Safe use:  hot water, about 80°-90°, and then 2/3 of the water, more than half of the water, and then exhaust the air. This is a hot water bottle use technique, everyone should pay attention to it. Note: The heat preservation time of the hot water bottle is related to the ambient temperature, water temperature and placement (bed or outdoor environment). It will be different in different environments. NOTES 1.Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. 2.Please allow us 1-2 cm errors for sizes ,thanks for your understanding.