A hot water bottle is one of the simplest ways to feel cosy on a cold evening. The options look similar, but the material, cover and filling method make a real difference to how pleasant and safe they are to use.
Rubber, silicone or microwavable
Classic rubber bottles hold heat well and are inexpensive, but they can have a rubbery smell at first. Silicone ones are often easier to fill and usually have no smell. Microwavable wraps filled with grains or gel skip the boiling water entirely and are handy for a neck or shoulders.
Covers matter
A soft fleece or knitted cover makes the bottle comfortable against the skin and stops it feeling too hot. Look for a cover that can be removed and washed.
Safe use
- Never fill a bottle with boiling water. Follow the manufacturer's instructions on temperature.
- Squeeze out the air before closing the stopper and check it is tight.
- Check the bottle for cracks or wear before each season and replace it if it looks old.
- Do not use a heated wrap or bottle on someone who cannot tell when it is too hot, such as a small child, without advice from a qualified professional.
Size and shape
A standard bottle is fine for a bed. A longer shape suits the back or lap, and a small one fits a bag or desk.