The run-of-the-mill rubber hot-water bottle, however, has one major disadvantage. The direct contact of the material on the skin immediately after filling can cause burns. This is precisely what happened to the founder of TROY when he fell asleep with a hot-water bottle on his stomach. The basic idea for an improved model was born.
The key component comes from the field of energy storage: sand. In the hot climate zones of the world, solar energy systems are used to heat large quantities of sand in order to make the energy storable. This very technology is also used in the TROY hot-water bottle. The side of the cover facing the body remains at a comfortable temperature for the skin, while the sand contained within stores the heat over a long period of time.
It is a clever idea and we like it - get it at troytroytroy.com