Mason jars as blender carafe's!!

Did you know that standard size mason jars will fit onto the blade section of a blender?? I just learned this today, and am soooo excited about the possibilities! Quick smoothies, all ready to go, just pop a lid on, and take to work. Soups for freezing already in the jar, no extra cleaning of the blender jar. Possibilities are endless! Ok, so it's not as exciting now that I've typed this out, but I think it is pretty clever, and can't wait to try it out.