Hot tubs, jetted tubs, and Jacuzzis can also be referred to as spas. In the U.S., people use this term for tubs with strong jets that provide a relaxing massage effect. Most of these so-called spas have molded seating and several jets all around to accommodate and massage multiple people at once.

热水浴缸、按摩浴缸和按摩浴缸也可以称为水疗中心。 在美国，人们用这个术语来形容带有强力喷射器的浴缸，可以提供放松的按摩效果。 大多数这些所谓的水疗中心都有模制座椅和几个喷射器，可以同时容纳和按摩多人。