**UPDATE – Marie let me know that The Amazing Pocket Chair
Groupon has a deal running right now where you can get The Amazing Pocket Chair for only $9 shipped! They can explain it better than I can, so here you go:
The portable seat fits into pocket-sized pouches for convenient carrying to the beach, ballpark, or garden. A dual-action counter-rotational base harnesses the strength of steel to support up to 250 pounds.
Sounds like an awesome option to keep in your trunk!