I was thinking (i know, god help us) about a way to get small animals into a vft's traps, then i thought. Well, a pvc tube owuld be good, but there not found too small and you cant see through them, then i thought, acrylic tubing, its cheap, durable, and see through! And can also be found in pretty much any diameter!
Somthing like this stuff:
Here is a link to get some acrylic tubing:
Tap Plastic - Acrylic Tubing