teabloom modern classic insulated cups – 6 oz / 200 ml – set of 4 double walled glass cups for tea or coffee teabloom teabloom’s line of borosilicate glass teaware is designed to meet the high standards of modern buyers. we know you have a choice, and that’s why we created these products for maximum enjoyment, convenience, and practicality. constructed of durable, crystal-clear borosilicate glass – the same material used in laboratory glassware – all are easy to care for and feature classic lines that enhance any décor. whether you’re buying for yourself or gifting a loved one, it all comes together in these simple, elegant, and versatile pieces. ships in a beautifully designed printed box. backed by teabloom’s full guarantee.