I also have some of the magnetic bowls, love them. I got mine at Harbor Freight... Use them all the time. Just remember if you are using a computerized sewing machine beware, as these bowls have a pretty strong magnet. I quilt with an old sears kenmore and an old old singer. Wouldn't trade those for all the bells and whistles on the computer machines. My computer machines are nice, but can't say enough about that nice straight stitch you get with the old singers and older mechanical machines.
Suzy