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Hawaii used to get all its water from rainwater, which was great. Only the population of Hawaii exploded in the 80s. This meant rationing as the government had to deal with tapping more sources (rivers, lakes, streams,
ponds, reservoirs, springs, and wells). I'm fairly sure that things are stable now, though Hawaii gets a TON of bottled water shipped in.
Anyway, with the table tepees, how many people get ice water and don't drink it? Imagine that amount every day and night every week of the year. That could eventually effect the bottom line of a restaurant. Also, consider that amount for every restaurant nation-wide.
As for cleaning glasses, they pay a dishwasher. It's just that simple.
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