needle fish bobber

this is bobber for needle fish. 
2 part for easy print. %5 infill and 3 wall is enough. 
place you swivels at top and bottom and fill empty part in middle with cement (or something to give a little bit of weight). after that you can glue two parts and use it as floating point. 
in here (Turkey), we are 1 or 1.5 meters length of fishing line and single hook at the end with light bait (mostly dead fish parts or silk) and cast it as far as we can. 

have fun and mind legal limitations. 

ps1: as always i have added freecad file too. 

ps2: there are 2 different sizes, you can print as you like, both fit.