There's no way to load pre-sewn koozies so that you can print the full bottom. We started buying unsewn koozies last year; you don't need a fancy sewing machine (pick one up at a garage sale), and it takes less than a minute per piece to sew up the sides (straight stitch, tack at top and bottom -- pull the thread out a little, load the next one and sew, then cut them apart after sewing). If you don't know how to run a sewing machine, go talk to an aunt or grandma who can quickly show you how it's done. You can print the full two sides + bottom in one swipe -- and can set up two of them on the screen, so you print two at once. WAY easier than printing pre-sewn!