So, like any good researcher, I did the easier, softer thing and looked it up on Wikipedia
The term aliphatic polyester refers to polymers having the structure [C(O)RO] n , wherein n is an integer representing the number of monomer units in the polymer chain and R is an aliphatic hydrocarbon, preferably a C1-C10 alkylene, more preferably a C1-C6 alkylene (e.g., methylene, ethylene, propylene, isopropylene, butylene, isobutylene, and the like), wherein the alkylene group can be a straight chain or branched
Check to see if the cooler you're considering turns off when the vehicle does, switches to internal battery power, or continues to draw from the vehicle's battery even when the car is turned off
As said by Anderson in his article on smoking while driving, one percent of [all driving accidents] are caused from smoking, thats 1,000 accidents a year