well. any cooler that will fit in your trunk, and is watertight. your trunk is for supplies. coolers are for water, which you shower with, and obtain after dark from light commercially zoned (not house) outdoor faucets.

I found one smaller and cheaper elsewhere. fits in my trunk, and goes thru a house outlet. to bathe.

esp. for cold weather. If you hate this idea, pay $40 a month for your YMCA shower.

You should use them strategically placed in your car. I let the drivers seat all the way back and passenger all the way forward and sleep diagonally across, feet to the wheel. Lay them out to create an even flat surface. When you wake stack them behind passenger seat and cover w/ sheet to avoid questions from people. A truck or van IS better, no seat moving needed. suggested quantity for car, 6-8.

this is for taking water from the water fountain after work, to brush teeth with tonight and tommorow morning, to drink if thirsty.

for all electrical devices thru your cigerette lighter.

for charging generator from ac converter while driving.

right front trash receptacle.

find your community college's web site and contact the administrative assistant in targeted department, asking for textbooks as a future student. read them now.

This is matched to the model of your car and allows your windows cracked in summer. See below.