@genepires you have to leave them in 20-22 hours a day, so leaving them out a day or two here and there could make your treatment longer. No they are not a choking hazard--you have to pry them off your teeth. I frequently do 3-day trips and the occasional longer trips, plus after-work sessions at the exits here and there.
@Bronco agree, they are a pita. Shot blox would be good to try. My issue is trying to get protein too. I've been trying drinkable yogurt for all-day cragging, but I don't want to be dragging that up a multi pitch climb. I figure with p'nut butter and honey packets my teeth won't rot out even if can't actually floss, brush until end of the day ;).
@Rad umm, I know how to handle my nutrition when I'm climbing. You can't really be chewing on nuts and other hard stuff with the retainers in, hence my question for workarounds.
@JasonG lol, Beckey was too busy doing first ascents to care about his teeth.