Fish/Shrimp trap

This trap is meant to be attached to a plastic bottle and the idea is to make it easy for the fish/shrimp to go through the cone and into the bottle but can't find it's way out.

The topmost bridge _- called bait holder -_ is meant to hold the bait (you attach it with wire or any other means.

The bait holder is hollow from the inside. This is both for saving plastic and for filling it later with sand and seal the top hole with hot glue to make the trap heavier to sink underwater.
A tiny sand filter design is included with the project for your convenience.

After cutting a bottle's top part, you can put the trap inside it. Any plastic bottle would do even if it's opening is 30% larger than the trap. Plastic bottles tend to shrink to more than 50% of their original size with heat so the idea is to put the trap inside the bottle then use a candle or lighter to carefully heat up the edge of the bottle to shrink it and make a tight grip around the trap.

Here is a short youtube vi