I have a clip that keeps the bite valve for my hydration pack on my shoulder. I like my fanny pack hydration pack.
People will make fun of you for whatever they want to. I don't let it bother me. Seriously, maybe 1/4 of the people on rides here wear them. The only crowd likely to say anything is the super-competitive lycra-clad racing bunch. And even then - maybe not.
Seriously - I'd worry about the poop. A bunch of people got sick on a ride here a few years ago. It had rained, and the poop from livestock trucks sprayed up on their bottles. ICK!
CA
Most days in life don't stand out, But life's about those days that will...