McDonald's seed starter?

Have you seen the new salad containers from McD's? Black bottom, clear snap on top, shaped like a flying saucer, lol. I just washed one out with bleach gel to sterilize it. Gonna plant some seed in it and set it up on top of the refrigerator to see what happens. These babies are "stackable", (invert cover inside base) so they won't take up a lot of space when not in use.