No need to call E.T. to go fishing! Grab your UFB (Unidentified Floating Bobber *TM) and get fishing!
There are two versions, a sleek top one, and a reversible one (both can really reverse, but, aesthetics, right!?)

To be used with a slip line system (a clamp weight, or swivel, or leader system) to determine where it stops on your line.
3mm Hole, for easy and smooth line drag, as well as feeding it through.

They float super well! even the PLA ones do great!
Built with a slight weight in the bottom, all the individual grid cells also have air pockets, so even if it's damaged, it will still float!

Drags fine, super visible, especially in white or red! Bobs nicely when hits a bite.