I’m in the heat of South Carolina and am frequently on long walks and on lucky days lounging at the pool. This thing does such a great job keeping your product at temperature that I left ice and water in the car overnight and when I came back the next day, the ice was still frozen in a block. It’s absolutely a solid design with a lid that seems tight and secure with no leaks. A lot of of the water bottles these days have a very unsecure or loose type of screw on top, but this is solid.
