A Mason jar is a molded glass jar with screw threads on its outer perimeter. It is widely used in canning to preserve food in our daily life. Due to its convient structure, there are many other products try to combine the features of mason jar with their own needs and create some interesting design in the shape of mason jar, such as drinking jars, oil candle jar. Take a look at the 7 Mason Jar Inspired Products in the post. And I have to see, have mason drinking jar at the picnic is a really awesome idea to avoid those annoying bugs.