This is a cooler bag, a top prize from the Mamegoma lottery. It's sized to hold four 500ml plastic bottles! It's rare, as it's not listed on Mercari or Yahoo Auctions. It's new, but it's from quite a while ago, so please refrain from purchasing if you are concerned about that. Returns are not accepted, so please purchase only if you understand this. Mamegoma Baby Mamegoma Baby Goma Goods san-x Mamegoma San-X Heisei Retro Rare Rare Item Cooler Bag New, Unused, with Tag Item/Type: Bag