The Rambler 8 oz. Stackable Cup is designed with the home (or far from home) barista in mind. It's designed to fit most espresso machines and the double-wall vacuum insulation keeps your coffee hot from the first sip to the last drop. It has a splash-resistant lid and unmatched durability. This is a cup built for your daily ritual, however and wherever you take it. Please note: This magnet slider is not leakproof and will not prevent spills.