I love using mason jars, all my cups at home are mason jars. Not only cause they're unique looking, but also because they are very versatile. Cuppow makes mason jars even more user friendly with their awesome innovative products. They are simple yet very elegant solutions to how we approach the increased usability of mason jars. Also don't forget to get one of these from Holdster if you plan on drinking hot tea or coffee, otherwise you may find yourself burning off your hand like I did.