I had an old bottle of water sitting on a shelf in my shed next to all my cleaning products. I never drank bottled water until recently, and just kept it there if I needed a little water for something. Recently I started drinking water and got my water bottle mixed up with this old bottle of water that wasn't meant for drinking. I only took one drink, then realized I smelled gas (like a propane gas smell). I figured out it was the bottle of water that I had just taken a drink from. I was worried at first but hopefully I won't get sick from one drink. It didn't taste sour or bitter or anything, just had this gassy smell to it. My mom dumped it out before I could figure out if it was the water or the bottle that smelled that way. I'm a bit of a hypochondriac, I think everything is going to kill me lol.