I've purchased a few of these glass cups. They look stylish, are the perfect size, clean up is easy and the wide band helps to keep your hands protected when drinking hot beverages.
I bought a 12oz Joco and a KEEPCUP to compare them. Aesthetics; Joco looks better. The finish of the band is modern and stylish. Function; the Joco has a much wider band, which helps to protect your hand from heat during use. The silicone on the Joco lid seems easier to use putting the lid on and off. Cleanup; the keepcup seems to get milk stuck in the ridge between the silicone and the glass. The Joco cleanup does not have this issue. Actual size; although both are "12 oz" Joco holds 354ml and the keepcup holds 340ml.
I have owned a Joco coffee cup for the last 5 years and recently lost it, I just purchased this indigo one and am loving it. Always the perfect companion when out and about.