Titanium mugs are great but when you pour a brew into one its white hot for 5 minutes then freezing cold the next. Metaflex Brew sleeves make a ti brew a pleasurable experience. Your favourite cup will stay piping hot throughout. In testing, boiling water without the sleeve was stone cold after 30 mins. Brew sleeve was still at a nice hot drinking temp after 30 mins. Fits Alpkit 400, Toaks 450, Evernew 400

Weight 11g