This is a multi-case purchased from Birthday, featuring the character Futausa. It's a case that can keep items like baby bottles, milk, water bottles, and PET bottles warm or cold♪ It's suitable for keeping baby bottles warm, especially during this cold time of year. Used once and still clean, but due to home storage, it might look slightly yellowed due to sun exposure, which is difficult to see in the photos. I've discounted the price accordingly. There are no issues with its functionality, and the inside is clean! The original price was around 1300 yen.