Continue knitting until your work measures 3.25” from cast on edge, then introducing your contrast color (CC) work all 33 rows of the chart.
Break CC yarn, continuing in MC for the rest of the pattern. Knit 2” stockinette (from the end of the chart section). Then decrease for the bottle neck as follows:
K1, knit 2 together (k2tog), k42, slip slip knit (ssk), k2, k2tog, k42, ssk, k1 (92sts)
K1, k2tog, k40, ssk, k2, k2tog, k40, ssk, k1 (88sts)
K1, k2tog, k38, ssk, k2, k2tog, k38, ssk, k1 (84sts)
K1, k2tog, k36, ssk, k2, k2tog, k36, ssk, k1 (80sts)
*K1, k2tog, k to 3 sts before SM, ssk, k1, SLM, k1, k2tog, k to 3 sts before EOR, ssk, k1
Repeat last row (from *) omitting knit round in between, until 40sts remain
Work k2, p2 ribbing until ribbing measures 8"
Use a stretchy bind off technique to finish, then break yarn. Sew your cast on row together beginning with the first stitch and last stitch of the cast on, and ending by sewing together the 2 stitches on either side of your halfway mark (see pics for reference). Sew in all your ends, insert the water bottle through the neck: Easiest to remove the stopper, and roll it tight with the textured part of the rubber facing in, then put the cover over it like you’d put on tights, releasing the roll once the bottom is at the bottom, then adjust your knitting around it so the edges line up and turn the excess of the neck over. Then block the piece on the bottle- I filled the bottle with hot water to make it dry faster.