Stanley Quencher H2.0 Flowstate Tumbler 30 oz 61044 SteelSol this midweight cotton tee delivers then expands to a this midweight cotton tee delivers timeless style with a comfortable fit that works for everyone Reflective Safety Details: Reflective details — including a black reflective O Endurance heat transfer bar on the back right shoulder and a black reflective O heat transfer on the left hem — add visibility for early morning or evening activity Long Lasting Double Wall Vacuum Insulation: The double wall vacuum insulation ensures your drinks stay refreshingly cold for up to 9 hours and iced for an impressive 40 hours — some sources note ice retention up to 30 hours giving you a robust