I made the first two as a reciprocal gift for a professor who gave me some handmade Japanese thread balls his mother made. I wanted to make the bowls to see how they turned out, and the timing was perfect to make them as gifts.
I then had three more balls of yarn that were appropriate for bowl making and decided to make bowls out of all of them.
One, the black one, is mine. The other two are probably going to be Christmas gifts, and will live in my gift box for the time being.
Timeframe: March 5, 2012 - June 14, 2014, a couple of days' crocheting and a week or so of drying each.