英国采购需求：水瓶、塑料水瓶、Tritan材质水瓶、运动水瓶、饮水用具

I'm reaching out regarding an issue with my water bottle. The silicone cap inside has gone missing twice, and as a result, the bottle is leaking. This has been quite inconvenient, and I would appreciate your help in resolving this. Could you please send me a replacement for the missing cap? I'd like to ensure that my bottle is fully functional again. Looking forward to your prompt assistance on this matter. Thank you!