Multi Functional Hot Water Bottle - Thermoplastic material that is recyclable. Advanced thermoplastic holds heat longer than traditional hot water bottles with cover, also works as an ice pack, or cold water bottle. But please Caution: The hot water bottle rubber is not suitable for Microwave oven heating.     Easy To Use - Wide mouth is easy to fill and the anti spurt lip of hot water bottle with cover prevent water spitting back out like those old rubber ones. Fill only to two-thirds capacity maximum. It's transparent. No more guesswork about how much hot water is inside.     Helpful Assistant - The classic design of this classic hot water bottle. Treating sore muscles, stress or cramps, arthritis, aches and pains, stiff necks, lower back pain, Gifts for women menstrual cramps and other mon aches and and can also double up as a cold press for person with fever or to reduce swelling for minor injuries. Good mothers day gifts for mom.     Care Instruction - Grid texture makes skin contact safer and more fortable. Comes with an elegant knitted hot water bag cover to prevent the hot rubber from being in direct contact with your skin to cause burns, plus it has a more classy and personalized look. The hot water bottle rubber should be replaced after two years of use. And check stopper for wear and tear damage at regular intervals.     After-sale Service - We are so confident with the quality of our hot water bag. But if you don't pletely satisfied with this product for any reason, please feel free to ask us at any time!