This is a Shinkansen (bullet train) PET bottle holder. It's the E5 series Hayabusa. It has an aluminum cooling material, a carabiner, and a shoulder strap. This is a new item. I'd like to sell it while it's still in good condition! *Although unused, I have opened it once to check for any issues. Image 5 The paper part on top of the packaging is peeling. This item has been handled by a person once, so please refrain from bidding if you are very particular about condition.