Institute of Domestic Technology El Jefe Joseph Shuldiner (full disclosure: I teach bread classes at the IDT) wrote a very cool column for the Los Angeles Times describing 5 mason jar hacks: an adult sippy cup, soap dispenser, tea infuser, twine dispenser and a pour-spout pantry container. No need to launch yet another Mason jar Kickstarter as these are hacks you can do yourself.
They missed one vital mason jar hack.
http://www.amazon.com/Mason-Cocktail-Shaker-Fits-Opening/dp/B00Z4F6S5M/ref=sr_1_3?s=kitchen&ie=UTF8&qid=1443470601&sr=1-3&keywords=Mason+jar+cocktail+shaker
Oh, indeed! That is very nice.