美国采购需求：双层咖啡杯、玻璃茶杯、玻璃酒杯、玻璃杯、玻璃壶、风暴玻璃瓶

I'm reaching out to inquire about your selection of glass cups. We're particularly interested in understanding the various styles and designs you offer, including any unique features or customization options available. Additionally, it would be helpful to know the materials used in production and any specific certifications they may hold. Could you also provide details on minimum order quantities, pricing structure, and lead times for delivery? We're looking to evaluate potential partnership opportunities, so any information regarding bulk purchasing discounts or shipping options would be greatly appreciated. Looking forward to your prompt response!