Thank you for viewing this product from among many others. This is a Pearl Metal stainless steel portable thermos, HC-49, 0.8L. It's suitable for carbonated drinks and sports drinks. I received this product from an acquaintance last month. I already have a similar insulated water bottle, so I don't have much opportunity to use this one, and I'm listing it for sale. Perfect for staying hydrated and preventing heatstroke in the upcoming hot summer season, this water bottle excels at keeping drinks cold. The cooling effect is measured by filling the product with cold water up to the bottom of the lid, placing it upright in a room at 20±2 degrees Celsius, and measuring the water temperature after 6 hours from when the water temperature reaches 4±1 degrees Celsius after the lid is closed. It is an unused item and in very clean condition, but it has been opened for photography and has been handled, so please refrain from purchasing if you are concerned. Please understand that this is a used item. We do not accept any claims, returns, or refunds after purchase, so please check the images carefully before considering a purchase.