Baby gorilla?

I will either stick a small glass jar in there on the edge of a rock, with a small piece of shrimp or cut the top off of a water bottle and staple it in backwards with the top facing the bottom with the shrimp inside. I have made the water bottle trap before but didnt use it. The shrimp needs to be a raw. I haven't tried either method where it worked yet. I only read about it on forums.