What size cooler is best for two people on a week-long road trip?

A 70-quart cooler is the sweet spot for two people on a week-long road trip. It balances capacity and portability — a 50-quart is too tight, and a 100-quart is overkill and a pain to haul. You can fit a 20-pound bag of ice, drinks, and a week’s worth of food without cramming. Plan on buying ice every 2-3 days unless you have a high-end rotomolded cooler.