Sweet Paul's Strawberry Polka-Dot Shake~Marshmallows in a milkshake? I guess if you're going to go for the milkshake, throwing in a couple of marshmallows won't make all that much of a difference! Besides, it makes a great looking milkshake!
Did you know that the thread of a standard-size mason jar is the same as most blender attachments? When home blenders were first made many of them noted this in the instruction manual. Check out the other 9 brilliant mason jar hacks