Rode the Schwinn Cimarron (it's now the $50 beater shopping bike) while I figure out how to make a cargo bike - to Cub Foods for shredded cheese, a dozen eggs, and a small bag of white onions. Here's a little cargo tip - before I put the eggs in my messenger bag, I tied an empty plastic grocery bag around the carton to hold it shut.
I love riding the bikes for these shorter trips. My wife enjoys it and she is increasing her stamina by walking around the block every morning.