This is a nostalgic Showa-era retro water jug. It's from about 30 years ago and has been stored unused in its original nylon packaging, but I'm selling it to clear out some space. The capacity is 4L. While the cooling performance may be weaker compared to modern ones, the retro design is very appealing. Although it's new and unused, it has been stored for a long time, so please understand this.