What's your race set-up? I have the same problems with a hydration bladder and not drinking, plus bladders cover too much skin and I over heat.
i have these two vest and carry two soft flasks (17oz). the soft flask are great because once they empty they just collapse and you don't have to carry an empty, bulky bottle.
https://ultimatedirection.com/to-race-vest-3-0/
https://ultimatedirection.com/sj-ultra-vest-3-0/
Soft flasks look like a great idea. Thanks.