Driving in hot weather: Chillows?

[cowmeat]

When you slammed the sun shade in the hatch, doesn't that make the hatch leak? Because may do this myself, because it's hotter than hell when I get in my car in the day time.

Nope, it doesn't leak at all, and it rains here basically every day. So far, so good!

[The donkey CRX]

The silver handle is a hand throttle attached to the gas pedal. It functions as a manual cruise control and allows you to rest your leg on long trips. It also help make precise throttle adjustments when hypermiling.

The "button" on top is a 3/8" lock nut that attaches the handle to the 3/8" all thread rod.

[Fat Charlie]

The neck ones are good. We used helmet and neck ones in the desert, and it didn't really matter how long they lasted because we had a cooler with ice water sloshing in the bottom and could toss them in it for a recharge. Dunking these things in cold water chills them quickly but you end up getting soaked- which is fine if it's 120 degrees and you're away from home for a year but isn't what you're looking for as a commuter.

The best personal heat sink I know is a soda can or three. They hold the temp for a long time and if you don't drink them, they're reusable. They're cheap, available pre-chilled everywhere and being in posession of one doesn't automatically make you some crazy-eyed hypermiler.