Let no one tell you front-loading washers don’t felt. =)
Modifications: I picked up 8 stitches on the diagonal rather than 6 and then didn’t do an increase row. I also knit two rounds between decrease rows on the bottom, except the last two (or three??) because I wanted the bowl to have a flatter shape. It worked out well. If I had to do it again, I’d probably pick a different reversible stitch for the Moebius strip so it would felt smoother (like moss stitch maybe?), but I’m choosing to think of the ridges as a design element. This was fun and really fast to knit!