We had consumed a few bottles of water and some iced coffee. I requested an additional bottle of water. The waitress brought it over and, without inquiring or inspecting, poured it into one of the unclean glasses on our table. I informed her, "That glass previously contained coffee." However, she disregarded my comment. When she presented the bill, I asked her for a fresh glass and a new bottle of water. She declined my request, suggesting that she would bring me a glass of tap water to replace the one she had poured into the dirty glass. (!) I insisted that she should have provided me with a clean glass regardless. In a rude manner, she uttered something and eventually brought a new bottle and glass.