1. What material is the glass cup made of?
(玻璃杯是什么材质?)
2. What capacity sizes are available?
(容量有哪些选择?)
3. How do you pack the glass cups for export?
(出口包装如何保证安全?)
4. Do you have certificates?
(有没有相关认证?)
5. Can you customize the glass cup?
(可以定制吗?)

