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719 liters is about as big as a Hot Tub.
(for Lifesmart Rock Solid Simplicity Plug and Play 4 Person Spa With 12 Jets) (a.k.a. Spa, a.k.a. Jacuzzi, a.k.a. Whirlpool) (Advertised Capacity)
An average, four-person hot tub holds 719 liters of water. Modern hot tubs became popular outside of Japan starting in about 1940.
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