I made a wine bag as part of a Christmas present for my mother in law and her new husband.
Their present was some local New Mexico wine, the wine bag and two wine glasses I glass etched hearts onto.
To make the wine bag:
Cut out two rectangles that are a bit taller than the wine bag and overlap around it. For the outside I used scrap upholstery fabric and silkly fabric for the inside.
Sew together inside out, leaving a hole big enough to turn right side out. Hand stitch the hole closed.
For the bottom cut two squares out of the fabric slightly larger than the bottom of the bottle. Sew together right side out, having raw edges stick out.
Sew square to one end of the tube.
Trim off the square corners making the bottom piece circular.
Turn bag right side out. Braid a tie out of matching yarn and hand stitch at seam.
Slip wine into bottle. Voila!