英国采购需求：活性药物成分、发酵产品、食品添加剂、原材料

I'm looking for high-quality retractable pens for our upcoming project. The pens should be reliable, smooth to write with, and suitable for daily use. Please provide details about the available options, including color choices and customization possibilities. Additionally, I'm interested in the pricing structure for bulk orders and any available discounts for larger quantities. It would be great to know about your production lead times and shipping options as well. Looking forward to your prompt response!