3-hour comfortably holds water sandwiches beach, as well as comfortably on a 4-hour trip, preserved meat bought from the street and various

Better than I expected. I haven't tried it yet in hot weather to see if it keeps the food warm/cold.

I have used it a few times on the beach for many hours. Its cooling is quite good, having two small bottles of frozen water inside the bag. As for durability, it seems good. Time will tell.