Oh, of COURSE we used the blender waiting for dinner on Monday, though it was in a "no alcohol" park so it was bananas and yogurt and ice. All those people who thought I was kidding :-) (that's www.bikeblender.com )
Still haven't done margaritas yet. Need a recipe and the right place and time :-) Need to tweak the details on washing too... Mainly I need to make a "blender kit" so I can get things going efficiently and easily. Didn't want to carry a cooler and ice up that 15% grade, either, tho' since I went as a volunteer and my car was the "refreshment stop" vehicle I might have been able to coordinate cold ingredients...