Remove the label of the cool drink bottle.

Cut the Bottle

Cut the bottle across, one-third its height from the top. Do not cut it completely,leave at least 25% for making the hinge. When flipped, the bottle should be flexible at the “hinge”.

Make Holes

Mark a pair of dots diametrically opposite on the shorter part of the plastic bottle.The marks should be located one centimetre from the top edge of the bottle.Then make holes at marked positions. Put one of the pencils through the holes.

Make another pair of holes on the longer flapping part of the bottle.

Prepare the Thread

Cut a piece of thread with 20-25 cm in length. Make loop at the one of the thread.

Prepare the Paper Clip

First straighten one arm of the clip,then bend it slightly. Attach a small piece of food on the loop portion of the paper clip. You should choose a food which will attract the rats.

Make a Small Hole

Make a small hole at the bottom part of the bottle.It should be parallel to the flapping portion of the bottle when bent.

Tie the Thread on the Bottle Cap

Insert the Paper Clip

Insert the paper clip (attached with food) in to the small hole made earlier.

Tie the Rubber Band

Tie the rubber bands on the two pencils situated on the two parts of the bottle.

Place the Thread Loop on the Paper Clip

Pull the thread and place the loop on the tip of the paper clip. Make sure the entire thing is stable enough to place on the floor. Stick a double sided mounting pad (3M) at the base of the bottle to place it firmly on the floor.