you need something called "plumber snake" which should be less than $10; tried Daiso but they might not carry it anymore
also checkout home depot, rona...
one time i recovered my mom's GOLD tooth brush from the toilet bowl which needed a bigger plumber snake
HAVE FUN!
shutterbug's picture is correct, the u-shape design is to trap stuff like that
don't give up, buy the snake
the snake turn in one direction, it's kind of like the wine opener