It's easy to turn up the heat this Valentine's Day with a Warm Tradition Hot Water Bottle. There's something so retro-chic about using these hot water bottles to relax and keep warm. I have been using my hot water bottle this winter to keep my feet toasty warm in bed at night. All I have to do is fill the bottle with hot water at bedtime and put it under my covers...sort of "preheating" my bed for when I get in at night, and staying warm until I ...