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The exterior pocket actually fits my 32oz canteen, which I wasn't expecting from the photos. Insulation held up fine on a six-hour drive with drinks and snacks still cold at the end. The yoga mat straps are a nice bonus I'll probably use more than I thought.

Took this to the beach last weekend and the insulated interior actually kept my drinks cold all day, even in direct sun. The side straps held my yoga mat perfectly, and I love that the exterior pocket fits my 32oz canteen without it flopping around.

I was pleasantly surprised that the exterior straps really do hold a yoga mat securely while I bike to the gym. The only reason for 4 stars instead of 5 is the interior could use another small pocket for keys.