The removable hot water bottle allows you to warm or calm down, it is made of organic flax seeds. Hot: Remove the cover and put the hot water bottle in the microwave for 1mn30 to 2mn at maximum power. Do not forget to put a glass of water to moisten the flax seeds and avoid burning them. Heat gradually in the microwave. However, check the temperature of your hot water bottle before taking it in your hands. You can put a few drops of essential oils after heating it. Cold: The cover must be removed, you can put the hot water bottle in your refrigerator for 3 hours or in the freezer for 30 minutes, perfect for muscle pain for example. The cover is machine washable at 30 ° or by hand, store it in a dry place. Composition: The cotton comes from organic farming and the flax seeds are organic Dimensions: 21X12cm Several patterns and colors are available. Limited edition, our fabrics vary according to the collections Handmade in Gironde #cotonbio #manufacturer #Gironde #faitmain #artisanale #zerodechet #circuitcourt #nouvelleaquitaine #lavable #reusable #durable