And then one of them must have come back that night or another, because I woke up in the small hours with a hot-water bottle under my feet.

NEWYORKER: Wakefield

Apparently, you have never tasted meat cooked to succulent perfection until you've been fed tenderloin that's been vacuum-sealed and hot-water-bathed for five hours.

WSJ: Keeping Up With the Vikings | Free Decorator

Research suggests that up between 20 and 30 gigawatt-hours (GWh) of electric energy could be stored as useful heat in hot water.

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It is then spread out evenly on mesh screens, dunked in water and left to bake in the hot sun for four hours.

FORBES: Waste? Not!