Just wanted to advise parents to go on the internet and google the Today Show's report about stainless steel water bottles. There have been kids that have gotten their tongue stuck in the water bottle and it is not easy to cut off. The stainless kind with a small opening are the ones that they were talking about. Kids accidentally stick their tongue in to get that last drop of water, it creates a suction and because of the grooves on the inside of the bottle, it will not release their tongue. After a short few minutes, the tongue begins to swell and it will really not come out. There have been several kids who have nearly had to have their tongue amputated. I know my kids have used those bottles and when I saw the report I was HORRIFIED. My young son got his finger stuck in a stainless steel fishing reel once and it was all but impossible for the fire department to cut off of his finger. After a couple hours of dismantling it, they finally were able to get it off because they could not cut through it. I cannot imagine having my kid have their water bottle stuck to their tongue. Please take a minute to look for the video and tell others you know about this hazard.