Supplies:
2 12.5" squares fabric (preferably complementary but different)
2 12.5" squares Heat 'n' Bond Lite
2 5" squares fabric (the same as or complementary to the 12/5" squares)
2 5" squares Heat n Bond Lite
1 12.5" square Timtex

Timtex is a stiff interfacing originally developed for the brims of baseball caps, or for Irish dance costumes (depending on who you believe!) It is now widely available at most quilting stores.  You can actually use any size square you want, but 12.5 is handy because 12.5" square rotary cutter rulers are widely available.

Fuse Heat n Bond to each of the 12.5" squares, then one to either side of the timtex.
Fuse Heat n Bond to each of the 5" squares. Square the timtex sandwich to 12" Mark halfway points on each side (at 6" on all 4 sides) Draw a line straight across, dividing the square into four sections. Fuse one of the 5" squares to the center of the timtex sandwich, aligning the corners of the square with the lines you drew across the sandwich.

Stitch around the smaller square.  Flip the sandwich over and fuse the second smaller square to the back of the sandwich, lining it up with the stitch line you just created.  Satin stitch around this square.  You can create all kinds of interesting effects playing with different colors in top and bobbin, different stitches, etc.

Now it gets tricky without a drawing.  Go back to the side that your lines are drawn on.  Measure 1/2" from each side of the line, then draw lines from those points to about 1/8" from the edge of the small square. You have now drawn a triangle, or wedge.  Cut the wedge out.  Carefully place the sandwich under your pressure foot at the edge of small square, with
the cut out triangle facing you.  Take a few satin stitches with the sandwich flat, then SLOWLY guide the edges of the wedge together as you stitch the side of the bowl together.

Repeat from "Now it gets tricky" on the other three sides.  Satin stitch around the outside edge.

You have a fabric bowl!  Of course, the possibilities are endless, this is just the absolute simplest form.  You can cut off the corners and have an 8 sided bowl.  You can make the wedge different sizes and totally change the character of the bowl.  You can make round bowls, square bowls, boxes. You can add machine embroidery, hand embroidery, rubber stamping, paint, glitter, whatever!.  A different type of bowl can be made from canvas
instead of timtex .

My most popular bowl to date is an octagonal bowl with purple hat fabric on the outside, one of the hats from the fabric appliqued on the inside on pale pink fabric, and rubber stamped ladies in hats around the four sides.  The rubber stamped hats are colored in with sparkly gel pens.  Then the brim is finished with fancy red beaded fringe.