You want a rotomolded cooler with a padded lid.

Yes, they exist, and they solve both problems at once. Rotomolded coolers are tougher than the cheap Igloo ones and actually hold ice for a day, and the good ones are designed to support a person sitting on them. The padded lid makes a real difference when you’re perched on it for an hour.

The lightweight part is trickier. Rotomolded coolers are heavy by nature—the thick plastic and insulation add pounds. But brands like Yeti, RTIC, and Pelican make “roadie” sizes that are manageable for short carries. For a long beach walk (half a mile or more), look at the Yeti Roadie 24 or the Pelican Elite 5. They’re around 10–12 pounds empty, which is about the sweet spot between durability and portability.

Don’t try to save weight by going with a soft-sided cooler like a PackIt or a cheap Coleman. Those won’t hold up as a seat—they’ll collapse or the lid won’t support you. Spend the extra $50 and get a rotomolded unit that doubles as furniture.

The padded lid is the feature you didn’t know you needed. Your tailbone will thank you.