Our glass Reusable Keep Cup is made of high quality borosilicate glass with great temperature and shatter resistance. It can bear from -40 degree up to 220 degree. The delightful design and practical features will help you enjoy your favorite beverages on the go. Savour the flavour for a much longer time with the thermal insulation, and add some personalisation with the printing and debossing options. Any of your guests will surely enjoy sipping their favourite coffee or tea. It's great for restaurants, hotels, coffee shops, and catering services.