These are rechargeable hot water bottles that I purchased a few years ago for camping. There are two of them. Brand: Ankipo Model Number: QL-OO1 Power Consumption: Max 400W Power Supply: AC100V 50HZ/60HZ Heat Storage Method: Rapid heat storage liquid charging method Heat Storage Material: Water (1300CC) Charging Time: Approximately 15 minutes, usable for up to 12 hours Materials: PCV, Polyester, Artificial rabbit fur Heat Storage Water Container: PVC flexible material (6-layer structure) Product Dimensions (Length x Width x Height): 26.5 x 18 x 5.5 cm