These take less than a minute to construct, allowing you to build multiple units for severe situations.
Step 1: What you will need
~ A 1.25L or larger soda / water bottle
~ Craft knife
Step 2: Constructing the unit
Now make another cut about 2 inches down from the cut you just made.
Keep the two large pieces.
These will be our trap.
Place the bottles neck aside to use in a future project.
Step 3: Constructing the non-return entrance
Make the cuts at diagonals to form spikes. They do not need to be spikes, but have to deter the rodent from trying to climb/jump back up the funnel.
It should look something like the pictures.
Step 4: Inserting the funnel
Insert the funnel into the bottom of the funnel as pictured.
Fold the tape over the edge tp seal the funnel in place. You may wish to add a little more tape to secure.