... 4. Manufacturer selling 1.Handmade double wall glass, not only in production and cost but ... and admire!3.Quality certificate: environment-friendly borosilicate glass, virulent and inodorous,safe for food, have passed ... ,ISO9001,FDA,LFGBProduct Features: 1.Use the borosilicate glass as material, clear, environment-friendly, good-touch ... the product Transparent Double Wall Glass Cup with handle