A brand new elevator system:
place a wool block and drop an ender pearl directly on top of it. Now, when you jump, you'll teleport to the wool of the same color above it (unlimited range, you just need to activate it with the pearl). And when you crouch, you'll teleport to the wool of the same color below it.
Tuto
Place a block of wool (any color will do)
Place an ender pearl on the wool block
Repeat the same process with yarn of the same color.
