Twist it in extended form to lock it in place. 3mm holes made for small rope.

Note:

If loops are too loose and fall through, then try to print inside walls first.

Printed in 0.2mm 

No supports

Dimensions approx. (inside)

bottom diameter 36mm

top diameter 65mm

height +/- 65mm

check out for more:

https://cults3d.com/en/users/UniqueDude/3d-models

Update 02.08.2024.

Added new files with less play.