This collapsing wand is inspired by a swordfish

It can accept a pen refill cartridge these are the ones I used https://www.amazon.com/gp/product/B09GK6C2QD/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

Supports are required, but make sure there are no supports in the model above the rings.