Gentlemen,
I went to follow one of the many fine idea's I've learned from all of you, and noticed something......
Yes, you can wrap about 10 feet of Duct Tape around a "Shopping Card", like the one's you "Prepay" on at Wally World.......But
If you wrap carefully and put the Duct Tape even with the side edge of the card, you have enough room left over to add about 10-12 feet of Electrical Tape to the same card!
Now I have a "Flat Pack" in my wallet and my wife has one buried somewhere in the bottom of her purse!

Krell