I like to use a French press for my iced coffee so that it has more body and a thicker mouthfeel. I use James Hoffmann’s French press method, but use a 1:14 ratio of coffee to water. The water is split 70:30 water to ice. After the brew is done, I just pour the “concentrate” over the ice to cool it, then pour over fresh ice in a glass.
My standard brew ends up being 32g coffee, 315g water, and 135g ice.
I’m a big fan of the Fellow Carter Move mugs. They definitely keep coffee hot (or cold) for quite some time. I actually have to cool off my freshly brewed coffee before I put it in the mug if I want to drink it in without waiting a long time. There are a few lid options, but I’ve found that the standard lid and slide lid keep temperature the best. There’s also several sizes available, though the 20oz is listed as a cold mug, it’ll work with the hot lids.
I realize I sound like a shill for the brand, but I just really like the mugs haha.