Should I buy an injection molded cooler or a rotomolded cooler?

Stick with injection molded unless you’re camping off-grid. Injection molded coolers are fine for tailgating, beach trips, and picnics—they cost around $50 and keep ice 1–2 days. Rotomolded coolers are overbuilt, cost $250–350, hold ice 4–5 days, but weigh twice as much. Buy the one that matches how you actually use it.