印度采购需求：软包装，复合塑料袋，食品袋，塑料包装袋，复合袋，平底袋

I'm looking for detailed information regarding coffee bags with valves for our upcoming project. We need to ensure they provide optimal freshness protection for our product. Specifically, I'd like to know about the materials used, available sizes, and any customization options that may be offered. It would be great to also understand the sourcing and manufacturing processes involved. Additionally, please provide information on your lead times, minimum order quantities, and pricing structure, including any bulk order discounts. If you have samples available, I'd appreciate receiving them for evaluation. This will help us make an informed decision quickly. Looking forward to your prompt response!