Prepare your bottle.
If you are using a jar with a tight fitting lid, you'll need to make two holes in the lid of the jar. The holes should be just big enough to fit the tubing.
We found that when we used a recycled spice jar, the holes where the spices came out were exactly the right size for the tubing, and then we didn't need to punch any holes.
It works best with a very small jar. Otherwise, it's challenging when it comes to suck up the bug, to create enough air pressure.