Hey guys, I’m late to the party but just came across this thread. I don’t find Nuun nearly as fizzy as soft drinks, but yeah occasionally it does develop some pressure in my water bottles. I make a point of leaving the top of the bottle open for a couple minutes just to let some of the pressure out, but it’s not like if I forget it’ll explode and take all the riders I’m with down in an electrolyte-filled mushroom cloud. In a camel pack you could probably get away with just waiting until the tablet dissolves completely until sealing it up, hopefully that helps.
I also just put together a review on Nuuns vs some of the other electrolyte drinks. Take a look if you’re interested and make it’ll help your prep, let me know what you think.