I've noticed this in virtually every casino I've gone to in North America... no matter where you go, every time you order water on the casino floor you get a little 8 oz bottle like the one below, and I've always wondered why this is. The alternatives of course, being to serve water in a glass (so as to reduce waste) or in a single-use cup (which probably costs less than a water bottle and doesn't take up as much storage space). Or perhaps serving a larger water bottle... since I find I often ask for more than one of these small waters in a given serving. I rarely, if ever, see small water bottles like these outside of casinos. Any insight as to why that may be? I can't be the only one who's noticed this.