Getting just the right temperature for your bath is quite a tricky procedure, but not impossible. Somebody came up with a concept to use a color-changing flower plug that is used in your bathtub instead, changing from pink to purple, making it easy to note when it is time to undress and hop into the bathtub. Of course, it still remains a concept at this point of time so your best bet would be using a regular thermometer momentarily.
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