I purchased this last year, but I no longer need it, so I'm selling it. I used it for one season, and I don't think there are any noticeable stains or scratches. This is a set of two. Rechargeable eco-friendly hot water bottle, eliminating the need for troublesome water changes. ◆ Cordless, so you can take it anywhere, this rechargeable eco-friendly hot water bottle "Nukunuku" can be used repeatedly. ◆ There's no need to change the water, and it retains heat for up to 8 hours after just 15 minutes of charging. ◆ You can use it as a warmer on your lap, as an ankle warmer in your futon, or warm your feet like a kotatsu by placing them on top of the hot water bottle. ◆ It's also great that the warmth lasts until morning if you charge it for 15 minutes while taking a bath or before going to bed. ◆ Flannel Version ■ Specifications ■ Size (approx.): [Body] Width 23 x Depth 28 x Height 5cm [Insulation cover] Length 28 x Width 27cm Power consumption: 360 W Charging time (approx.): 15 minutes (at room temperature of 20°C) Continuous usage time (approx.): [For ankle warmer] 8 hours (when used in a futon) [For warmer] 4 hours (when used against the body)