Piston elevators can be made in many different shapes and sizes. They do have a few items that are always necessary. Slime blocks, sticky pistons and some sort of redstone trigger are necessary.

Minecraft | Fast & Simple 2x2 Slime Elevator That Anyone Can Make ... redstone block, piston, sticky piston, and string! This elevator moves you upwards at 16.34 blocks/second, ...

Sticky pistons are the building blocks of redstone construction in Minecraft - the glue that holds together secret entrances and deadly trapdoors alike. Their possibilities and limitations have ...

Players can build automatic farms, piston doors, boolean circuits, and whatnot. Recently, a Minecraft Redditor, u/Intelligent_Rent4594, created an escalator with tons of different redstone blocks.