Keep Coffee Warmer ... Use 5V3A charger, plug the mug in and it can be heated and insulated the entire time, and can heat cold water up to 140℉ and keep drinks warm. The heating time takes ...

Although it’s natural to want to turn to the microwave to easily heat your cold brew ... You can use it to warm up cold brew coffee in a microwave-safe mug; however, this method will change ...