It was only a week ago, but we've forgotten all of what was in bin #3. Off the top of our heads, though--
-snacks (cookies, candy, popcorn, cocoa)
-cleaning supplies (dishwasher tablets, sponge, paper towels)
-grilling supplies (grilling foil, grill flipping tool)
-paper supplies (napkins, TP, plastic utensils)
-toys (sand pails and shovels, pool noodle, glow bands, special gift for next recipient's sons)
-ponchos (3 or 4?)
-bath products (shampoo, conditioner, lotion, soap)
I'm sure there was more, as it was hard to fit the lid back on. Hope this helps!