Nipples purchased February 2025. Rings purchased December 2021. Caps are not included. Sterilized by washing and steam sterilization in a microwave, but please wash and sterilize again before use. These are used items, so the price includes shipping. Please refrain from price negotiations as I do not plan to lower the price. I used Pigeon's standard baby bottles and chuchu baby bottles (not the slim type). The caps from chuchu can be used, although they may not fit perfectly.