I was on a very short UAL flight (ORD-DET) a few years back and I asked for a cup of coffee and a bottle of water (they had those little 8 oz bottles). The flight attendant explained to me that because it was such a short flight, they were only giving out one drink per passenger. I didn't, but should have, told him that in the length of time he took to explain that, he could have just handed me the damn bottle of water.