Microwaveable hot water bottle that lasts for 7 hours. - Color: Pink - Size: 18 x 25cm - Usage Time: 7 hours - Heating Method: Microwave - Heating Time by Output: 500W: 3 minutes 10 seconds, 600W: 2 minutes 40 seconds, 1000W: 2 minutes - Used 3 times. I am selling this because I purchased a set of 2. The cover has been washed and disinfected. It's very comfortable. It's warm in the futon when sleeping. Thank you for looking.