I created a good solution for the regular butyl tubes...use a FoodSaver vacuum bag. I deflate the tube a much as possible, then make a foodsaver bag just big enough t get the tube into it. Vacuum it, seal it up and cut the excess bag around the tube off. Two great benefits...1) it's compressed to the smallest size and 2) since it's in the bag, it slides into storage spaces better. Otherwise, rubber usually will grab onto everything as you try to cram it into the seat bag.

It might also extend shelf life of the tube, as there is very little air to rot the tube. But in reality, I'm using them up rapidly enough that they aren't sitting for years...