Peanut Butter Jar Mousetrap Insert

Here's my totally untested design for entry in Cathal Garvey's Mousetrap challenge.
(Challenge: http://blog.makerbot.com/2010/03/01/cathal-garveys-mousetrap-design-challenge/ )
(Cathal: http://www.thingiverse.com/cathalgarvey )
Thankfully I don't have the vermin problem Cathal does. The downside is that I have neither tame nor wild mice to test this design on.

The idea is to cut out most of the lid from a peanut butter jar and insert this printed lid. Hopefully it will allow the mouse