I’ve had my St. Patrick’s Day Stanley flask since early March 2025. Since then, it’s been with me on a variety of expeditions, including a birthday party, St. Patrick’s Day celebration and ...

As a regular user of both, I tested each brand’s 40 oz. tumbler to determine who comes out on top in the great Stanley vs. Hydro Flask debate. $40 AT AMAZON. Hydroflask. $45 AT AMAZON.

In 2020, the Hydro Flask was the “it” water bottle, the kind that middle schoolers put at the top of their Christmas lists just like the Stanley cup of today.