On 22 July, I was on a long walk (11.26 miles) and had run out of water in my water bottle. I stopped into the store (approximately 0730 AM) and asked if I could fill up my water bottle in the bathroom. (I did not have any money in my wallet to purchase another bottle of water.) I was curtly informed that they did not have any water for me. I might note that I was wearing PT gear and had a shirt with USMC on it. I decided that confrontation would obviously not be effective, so I walked out and was welcomed at a store down the street.