Roto-molded coolers vs injection-molded coolers: Roto-molded wins on ice retention, but injection-molded is lighter and cheaper for casual use.

Roto-molded coolers hold ice two to three days longer due to thick, seamless walls and better seals, but they’re heavier, more expensive, and harder to carry. Injection-molded coolers are lighter and cheaper, fine for day trips or picnics. Most people don’t need five-day ice, so choose roto-molded for off-grid camping or weekend tailgating, and injection-molded for the beach.