If the goal is to keep fluids cold, I have the coldest water bottle in 64oz version. It will keep water ice cold without any prep for a full day. I bring it when working at the property in the summer. A little big to hold with one hand, but they have a decent carrier that has a strap on the side to hold one handed. I never really use it for hot beverages but it supposed to work well for those too.
https://thecoldestwater.com/product/the-coldest-water-bottle-growler-64-oz-vacuum-insulated-growler-and-wide-mouth-water-bottle-cold-up-to-36-hrs-hot-13-hrs-double-walled-with-strong-cap/