hot bag

plural hot bags · alternative hot-bag · alternative hotbag

1. A bag designed to generate and/or hold heat, used as a hot compress or warming device.

   […] replace the hot bag at the base of the brain with the ice bag.

   1907, A. Winegar-Simpson, “Water-Cure for Headaches”, in Good Housekeeping, volume 44, page 564

   3 more examples

   The exact effect of the fomentation may be secured by wrapping a hot bag with a moist flannel cloth .

   1904, John Harvey Kellogg ·, Rational Hydrotherapy, page 812

   Think of having a hot water bag which you can take up at any time and by simply removing the stopper have instantly a hot bag that will give off a dry, even heat for hours longer than an ordinary bag filled with water.

   1906, “The Improved Heat-Storing Bag”, in The Voice of the Retail Druggist, volume 1, page 369

   Some therapies are performed by heat generated from herbal medicine (Kanli coarse sand therapy), chemical reaction (chemical hot bag therapy), electricity (electrothermal therapy), and so on.

   2015, Clifford L. K. Pang, Hyperthermia in Oncology, page 17

2. A bag for keeping pizza hot during delivery.

   The hot bag, designed to keep pizza hot while being transported to the customer, was invented in 1983.

   2013, Brooke R. Envick, Achieving Entrepreneurial Success, page 51

   2 more examples

   The latest hot bag innovation is based on the same technology that enabled the Thermos bottle to keep soup hot for generations of school children.

   2004, Pizza Today - Volume 22, Issues 7-12, page 57

   Domino's HeatWave hot bags were introduced in 1998 to keep pizzas oven-hot during normal delivery. Originally, each hot bag contained a patented heating mechanism charged by plugging into an electric outlet at the store.

   2012, Alok Kumar Rai, Customer Relationship Management, page 228

3. Used other than figuratively or idiomatically: see hot, bag.