This slim can cooler is a little too slim and does not stretch much. I had to do a good deal of pulling to get the cooler around a slim can. Many of my other slim can coolers will also fit around slim water bottles. There is no way this will fit around a water bottle. It may stretch out over time, but as it is now, it is very hard to fit around a slim can. Had I known this before buying, I would have purchased the regular can cooler (which I imagine will probably be on the slim side since the slim cooler was too slim). I like the design, but the size is a little too small.