• Drill one hole in the top (as described above) for the mice to enter
• Put some bate in the container
• Put the lid back on
• Drop in some dry ice (a little goes a long way)
• Wait
  

I seem to remember reading some where that in normal traps the animals give warning to others, so one is limited to how many can be trapped at a time.  With this system, the mice "go to sleep" without any stress.  They don't know they are trapped and don't alert anybody else.

~james

p.s. do not put your head in the tub with dry ice.

Interesting ideas, James.

I made two more last night. It takes about 15 minutes once you have a template for the holes. You can get these containers with lids really cheap from the dollar store. I like cheap.

Depending on how large you make the holes, you can have the cups sitting at the bottom of the container (and water from the bottom) or have the cups suspended in the container to avoid over saturating the roots(watering from the top).

Really, the biggest advantage to this contraption is in keeping the cups from falling over.

Frank