I got a bunch of these because they were handed out at a gathering of moms. Materials: Nylon, PVC Heat resistance: 120°C Cold resistance: -20°C Sizes: Capacity: 1L (approx.) 17.5 x 25.5 cm / 2L (approx.) 22 x 34 cm Weight: (approx.) 225g / 285g *Please refer to the image for the 2L size. Product Contents: Dedicated cover x 1, Hot water bottle body x 1 Colors: Gray / Pink / Brown / Silver Gray / Purple *Please comment with the capacity (1L or 2L) and color when purchasing. *Remaining stock information: ・Gray 2L 0 / 1L 1 ・Silver Gray 2L 0 / 1L 0 ・Purple 2L 0 / 1L 4 ・Pink 2L 0 / 1L 0 ・Brown 2L 0 / 1L 1 【Easy to Use】 1. With the hot water bottle body in the cover, let the boiling water cool slightly before pouring it in (do not use 100°C hot water). 2. Slowly add water up to 2/3 full. 3. Slowly release the trapped air, tighten the screw, and check for leaks before use. *A soft, removable knit cover is included, which insulates the hot water and maintains its effect for 6-8 hours. Notes before purchase: *The way colors appear may differ depending on the settings of your monitor. *Product package specifications may change depending on the arrival time. Precautions for use: ・For safety, the heat resistance is up to 100°C, but do not pour boiling water under any circumstances as it is dangerous. ・Do not use with the water bottle full. ・There is a risk of low-temperature burns, so do not use it in close contact with your body for extended periods.