The slip stitch technique is most likely best know for its ability to allow a knitter to design some fancy color work that requires the knitter to work with only one color per row/round at a time - no stranded knitting required!
I've already used this technique for my Chincoteague Cardigan (Interweave Knits Weekend 2010) and was looking forward to further explore its possibilities.
One thing I've noticed is that it is a really neat way to make vertical stripes without stranding or intarsia or working side-to-side. So, with this cap, I've combined some mosaic design with vertical stripes and called the cap "Vertical Mosaic":
It knit up really fast and my kids already want their own caps in their school colors. Haha!
This cap was knit with Patons Classic Wool in "Royal Purple" and "Winter White" (a worsted weight 100% wool yarn) on US #7 (4.5 mm) needles.