Please read the self-introduction (required reading). Thank you for viewing. This product is a set of 2 lids for the Snow Peak Titanium Double Mug 450ml, a long-term storage item. These are discontinued plastic lids, not silicone. They have been stored at home for a long time without being used. I believe I washed them once with a neutral detergent immediately after purchase. The diameter of the part that fits into the mug was approximately 77mm. Condition: Purchased new and stored at home for a long time. Notes: Although I believe they are in good condition, there may be scratches or marks from storage. Please review the images carefully before purchasing and understand the condition. There are many inquiries asking, "I would like to buy, is a price reduction possible?" However, please do not inquire and instead, state your desired price. However, I will consider price negotiations that are beyond common sense as unnecessary to respond to and will delete them. Also, many people come to negotiate the price immediately after the item is listed, but if the price is not one I can accommodate, I will delete the comment without responding, so please understand. There are also comments asking for the specifications. Most of those who ask such questions do not end up purchasing the item. Except for special cases (discontinued products, etc.), please research the product yourself on the manufacturer's website. Thank you very much.