A waterbed, water mattress, or flotation mattress is a bed or mattress filled with water. Waterbeds intended for medical therapies appear in various reports through the 19th century. The modern version, invented in San Francisco and patented in 1971, became a popular consumer item in the United States through the 1980s with up to 20% of the market in 1986 and 22% in 1987. By 2013, they accounted for less than 5% of new bed sales.
Softside waterbed 160 by 200 centimetres (63 by 79 in) with dual heating (top) and two water chambers and flexible chamber isolation inside (bottom).
Image: Softside Waterbed Outside
A bed is an item of furniture that is used as a place to sleep, rest, and relax.
Bedroom on the Detmold Open-air Museum premises
Modern day beds
Tutankhamun's gilded bed from the 14th century BC, a bier from his tomb, fashioned to resemble the goddess Sekhmet, the fierce lioness who was the protector of the kings in life and death, Cairo Museum
These stone boxes in Skara Brae are thought to have held bedding. The stone-built settlement was inhabited between c. 3180 BC to about c. 2500 BC