Material and Size - Our hot water bottle is made of odorless, latex-free pvc. What you need to be aware of the size,the capacity is 1.5L, external dimensions is 8.7x 9.8 x 2 inches; Weight is12.4 ounces.mini, lightweight and portable, not only heat-resistant ,but also non-charged and suitable for travel.Especially on a long flight or bus ride. Heart-warming Design -The hot water bottle with cover which soft and comfortable protective cover can not only relieve your fatigue, but also to prevent direct skin with water bottle contacts, effectively avoid burns.For the hot water bottle and the jacket to fit better,you need to fold the water bottle in thirds in order to get it to fit inside the opening. You need to fit your hand inside the opening and work unfolding the hot water bottle. Working Time - This hot water bag can keep warm for 3-4 hours in outdoor,can be kept indoors for 5-6hours and use under bedding for 8-10 hours. In the cold winter night, a hot water bottle with a lid can keep your feet warm and make you easy to fall asleep. It is the best choice for warming the bed. How to Use - Pour hot water into the hot water bottle. It should not exceed 80 degrees Celsius to avoid burns. Because of its wide mouth, it is easy to fill, and it can also be used as an ice pack or cold water bottle. Safe, healthy and environmentally friendly but please note: it is not suitable for microwave heating. Best Gift - A hot water bottle is a classic home remedy. The bendable bottle can fits the bodyeffectively relieves menstrual cramps, muscle soreness and winter cold and creates a relaxing and warmer atmosphere. It is the perfect gift for family and friends in this winter