Hi! I love my side pack. Never thought about putting a water bottle in it but it totally fits. I added a photo of it closed wit the water bottle in it. The photo is with it at it’s longest and shortest setting, I’m 5’3” and soft around the middle. It’s a good sized bag with a little bit of weight, but I always wear it cross body and I don’t have any issues. I think you’ll love one.
Perfect, thanks!!!