My fiancé uses this for kayaking. It keeps things nice and cold and dry. It’s not too big. Fits an ice pack, bottle of water, sandwich, fruit, and a small snack bag of nuts or a granola bar or such. He loves it.I bought the 5L bag in blue. It was used to keep beer cold at the beach when the temps were in the 80's. and keeping groceries cool from the store to home. Worked perfect and did not leak at all. I just poured the melted ice water out when done using. The top stayed closed and it was great to have the strap for a way to carry hands free.This thing is awesome. Easily holds 12 cans with ice and keeps it cold, even in the summer. Easily packable and foldable when done. Great for hiking, pool, whatever.I bought the 5L bag and it was perfect for two bottles of water and a Tupperware container of berries, and a small bag of almonds. It holds more than it looks like it would. I put the food in there cold and did NOT use an ice pack inside and it kept cold for several hours inside my kayak as I was out on the lake. Great bag. Easy to use. Perfect size to bring a snack or lunch for one or two people.Great for adding some cold storage to a backpacking trip. I use it for Freezing some pre-made burritos and bringing them with me to throw on the fire.Just as advertised. I got the smaller one. I will probably get the larger one as well. It definitely fits a few drinks or a sandwich and a drink. Excellently made.This bag is perfect for a day of kayaking at the lake. It worked great!Got this to walk around Vegas with, my husband loves it and it does not leakThis bag is fantastic and exactly what we were looking for. We do a lot of mountain biking and like to pack beers for on the trail. Even with multiple ziploc bags, the ice would melt and leak through bags, the cooler and the backpack soaking everything including the person wearing the backpack. This cooler is totally waterproof and is the perfect size for carrying inside a backpack. It easily holds 4 king cans of beer and loose ice. It keeps the ice and beers insulated for quite a long time, and even with leaving it full of water over night, it does not leak out of the bag. Absolutely recommend.Excellent! Was looking for small dry bag cooler for keeping my beverages on ice while out on a trail ride. This works perfectly and is holding up quite nicely so far. Water does not leak from bag. I also have the larger one and use it frequently. It lines a bike pannier.Made with care, easy to clean. Sizing is good for a number of items you want to keep dryits bigger than i thought. closes up nice and attaches to my SUP