borosilicate glass cup 1,borosilicate glass cup 2,eco-friendly,heat resistant 3,high quality,good price 4,trial order Product description: 1,Material is high grade borosilicate glass which is eco-friendly,heat resistant and no plumbum included2,different volume which is 300ml,350ml,390ml,430ml,530ml and 590ml3,we can offer straight double wall glass cup and double wall office glass cup with ...