Opened for photography, but it's a new, unused item. 0.4L (400ml) Heat retention: 60 degrees Celsius or higher (6 hours) Cold retention: 10 degrees Celsius or lower (6 hours) ❄︎••┈┈┈┈••❄︎••┈┈┈┈••❄︎ Please read the profile for important notes ❄︎••┈┈┈┈••❄︎••┈┈┈┈••❄︎ *For those who understand the sale of used items by a private seller, please purchase.* *Buyer priority.*