Step 1: Supplies
Your going to need the following:
some kind of harmless insulation foam, i used some left over acoustic foam i found.
and supper glue
optional, is you can find it, foam sheets, like 1/8" thick
Step 2: Main Body
first take the strip of foam and put it in around the wall of the can.
cut it to a good fit.
Step 3: Linings( With Foam Sheets)
ok trace out 3 circles approx. the size of the can a little smaller
although the third be a little smaller than the other two.
Now you glue the first one to the bottom of the main body of the can.
then put alot of glue on the first sheet in the lid, and glue on the third slightly smaller circle
the reason for it being smaller so it allows a good fit of the lid and body.
Step 4: Status
now cut out slots for the thumbdrive to fit.
now glue the outside foam down to the bottom
and this is what you should have.
now see if the thumbdrive fits.
if not continue trimming away to make it fit.
Step 5: Your Done!
Make sure you let the glue dry for about 30 minutes or it might stick.