From this point you will simply continue normal Tubular Peyote Stitch. After you have added 5 or 6 more rows, slip the bottle into the work. While it's easier to work on when it's not on the bottle, your work will be more even and fit better if you work directly on the bottle. Keep your tension tight so that the beading will not fall off the bottle spontaneously.
Continue adding rows until you reach the portion of the bottle that tapers at the top. When you get to the point where there is space between your beadwork and the bottle, it's time to decrease. Space your decreases evenly around the bottle. You shouldn't need to skip more than 4 or 5 spaces in this row. Add one or two more rows, decreasing as necessary. Sorry I can't be more specific, this all depends on what beads you are using.

