Cut the zipper part off your sandwich bag. Leave about half inch of bag attached to the zipper part. Do not throw away the rest of the bag.
Make two pieces of Duck Tape® fabric that measure as wide as your bag and 4 in. tall.
Tape the fabric you made in step 2 to the zipper from step 1. Repeat for the other side with your second piece of Duck Tape® fabric.
Fold a single piece of Duck Tape® over each of the open edges of the supply case to close them up. Trim any excess tape.
For the I.D. holder cut a rectangle out of the remaining plastic bag that measures 2.5 in. tall by 4 in. wide.
Cut a 1 in. tall and 4 in. wide strip of Duck Tape® and fold it over the top of the plastic rectangle from step 5. Use 3 more pieces on the sides and bottom to attach it to your case, keeping the top open
Add a second border or design.
Create a tab to add to your supply case by cutting off a 5 in. long piece of Duck Tape®and folding it over on to itself lengthwise.
Cut a 1 in. slit in the side of your supply case with a craft knife and insert the tab. Use a small piece of tape on the inside to hold the tab in place.