Thank you for viewing! This is a rechargeable eco-friendly hot water bottle that can be used repeatedly without the need to add hot water. Perfect for cold hands and feet, and menstrual pain. This hot water bottle provides up to 10 hours of heat retention. Comes with a soft, smooth, and gentle-to-the-touch cover. It's sure to be a welcome gift! - Color: Gray - Maximum heat retention time: Approximately 10 hours - Charging time: Approximately 12 minutes - Uses: Cold hands and feet, menstrual pain, preventing children from getting cold in their sleep, and for pet cold protection a88 #jory's Apparel Shop