How about...
Travel Bubbles? An Omnibub, if you wish.
After all, we have a Bubble Tuner. There could be a complex recipe that could produce a Travel Bubble... other people could even share your bubble if you allowed it.
This may allow some vertical travel, to spots inaccessible without a bubble that would give you a reward, or take you into a secret area.
Perhaps there could also be Fligs. Flying pigs. Pigasus? Yeah, I know. :p