Step 1: Materials and Tools
Depending on how light you wish to so you choose plastics to suit.
For this instructable I chose a clear clothes detergent bottle (1)PET, a white detergent bottle (02 PE-TD)and a fruit container (5).
You will also need a pair of scissors
A paper punch
and a ruler and marker.
Step 2: Material Blanks
The ones shown would make many cord locks
Step 3: Layout, Cutting and Punching.
I will show how to make a single lock. A little imagination will show you how to make multiple locks at the same time.
Using the metric guide layout your new cord lock.
Trim off excess plastic
Mark your center line and the position for punching either end of the lock
Punch your holes with the paper punch
Step 4: Finally
Pull the cord through to tighten the bag or clothing. To loosen slide the lock away from the closed position
These locks are so light individually they did not register on my scales. The four I made in total still did not register.