i have a wheelchair from newskill but i need more elevation.
there is 3 sizes:
20mm height .
36mm height .
50mm height .
and same sizes with holder piece.
you can print the bottle holder here: https://www.thingiverse.com/thing:3944166
Headphone holder here: https://www.thingiverse.com/thing:6606261
cup holder here: https://www.thingiverse.com/thing:6606724