> you don't get a clear charge price before you leave. So you have to check a page either some minutes or hours later and hope that the total is correct
Oh, I’m very much sure this is a feature. Because, you see, only some percentage of people will actually look at the receipt. Some fraction of them will notice the error. Some fraction of those people will actually be motivated to spend their time on the phone clawing back an extra $8 water. The complement of that small percentage is a lucrative chance to sell the same overpriced water more than once.
