I've had my tumblr for probably half a year, and the amount of times it's been easily tipped over and spilt water everywhere, even when the lid doesn't pop off, is more than I can count. Even if I'm walking with it at full capacity and it's tipped at an angle water STILL leaks out. I've embarrassed myself at the gym when I realize I'm the reason for there being a trail of small puddles around the equipment. Do yourself a favor, and either buy one of Hydro Flask's other styles of water bottles or buy a tumblr with a handle from another company who figured out the spilling issue.
[This review was collected as part of a promotion.] The Hydro flask themselves were fantastic. The etching of the name that we used and stuff was very small. That was the only disappointment that I had but everything was great.
[This review was collected as part of a promotion.] The tumbler is the perfect size to remind me to stay hydrated and still fits in the cup holder in my truck. I purchased the medium tumbler boot for added stability. My only critique is that the lid isn't a screw on lid but a push in lid. For people who are clutzy like me and accidentally knock your tumbler over the lid doesn't stay on. I had 40 oz. of ice water all over my wood floors. That'll teach me to be more careful.