Harbor Freight 20 oz. Double-Wall Insulated Stainless Steel Tumbler

Originally a Christmas gift from my brother-in-law, this $8 tumbler keeps ice water colder (even with the lid off) than any name brand insulated drink cup I've used: YETI, HydroFlask, Swell, Mizu ... not one of them compare to this absolute beast of a cup. Colder water + a wide brim = I drink more water all day long.

I've lost two of these, and you can't typically order them through the website -- you actually have to haul your butt down to a Harbor Freight, find it and buy it. (Maybe you can order it online now? Maybe it depends on which HF you're closest to?) They're oftentimes on an end-aisle display somewhere random. Think of it as a fun adventure to find. Add a sticker or two, or a "raising awareness" wristband of your choice around the ridged part to make it yours.