I recently used Flow Formulas 90 to get basically all my calories into my bottles for a 105 mile race. It worked great from a fueling standpoint, but I noticed it slowly clogged up my bottles, to the point that I wasn’t quite finishing bottles before swapping to the next.
I was just using my trusty 800ml SIS clear bottles. I’m curious if anybody has had issues with dense nutrition mixes clogging like I experienced, or have any recommendations for bottles that might be less susceptible to clogging?