See the pictures below for some improved noodle jugs I made for Christmas presents for my fishin' friends last year. The pipe is 1/2 inch PVC plastic which fits the foam noodles perfectly. Standard trotline clips are fastened on the opposite end (see photos including my spokesmodels). You'll also notice reflective tape on the foam end pipe cap. The trick of this jug is what you can't see. Inside the pipe is a piece of rebar about 5 inches long. You could use old nuts & bolts, whatever for the weight. Before you set the line out you tip it so the rebar slides to the noodle end and it will sit flat on the surface of the water. When Mr. Cat takes the bait, the jug and pipe will tip up, the weight inside will slide to the other end, and the whole thing will stand up in the water, sort of a built-in bite alarm. Of course you may need a weight on the end of the line to meet state regs. There are also usually labeling requirements, I believe, and they have to be attended regularly. I can't take credit for this myself. I found it on the internet somewhere and built up a bunch of these. A couple of these makes a great, economical Christmas present for your catfishin' buddies.