With A, chain 31.
Row 1: Single crochet in 2nd chain from hook and in each chain across - 30 stitches.
Row 2: Chain 1, turn, single crochet in each stitch across.
Repeat last row 6 more times.
Work 8 single crochet evenly spaced across short side of piece. Work 30 single crochet along opposite side of beginning chain. Work 8 single crochet evenly spaced across remaining short side of piece - 76 stitches around base. Single crochet in each stitch around until Bag measures 5 1/2 in. (14 cm) from base. Fasten off A and join B. With B, continue in single crochet around until Bag measures 10 in. (25.5 cm) from base. Fasten off.
With A, cast on 30 stitches. Working back and forth on circular needle (just as when working on straight needles), knit 6 rows. Pick up and knit 8 stitches along short side of piece, 30 stitches along cast on edge and 8 stitches along remaining short side - 76 stitches around base.
Place marker for beginning of round and join, being careful not to twist stitches. Working in the round, knit every round until Bag measures 5 1/2 in. (14 cm) from base. Change to B. With B, knit every round until Bag measures 10 in. (25.5 cm) from base. Bind off.
Weave in ends.
Wash by machine on a hot wash/cold rinse cycle with detergent and several pieces of clothing to agitate. To felt additionally, dry by machine on a regular setting until almost dry. Remove from dryer and pull into shape.
After felting, cut a 3 1/2 in. (8.75 cm) slit centered on back of Bag, about 1 1/2 in. (3.75 cm) down from top edge. Repeat on front.