double wall glass beer cup ,370ml and so on. borosilicate glass,Eco-friendly,good ... Dishwasher and microwave safe This double wall double wall glass beer cup is great for latte, tea,juice,water,beverages, if ... made by client's requiremens.The double wall glass beer mug material is heat-resistant borascilicate glass, it is ... Our Factory: Production Process:SGS Test: borosilicate glass double beer cup