I knew that when I bought my first one, but it toom me 6 months before I realized I didn't want to use the canister of fix-a-flat that's provided. It makes a mess, can/will change the balance of your wheel, and cost $50 to replace. No thank you, I'll get a tow and then get it plugged.

Coin holder I found the first night when it came off the covered truck on May 5th 2005.