That looks a whole lot more complicated than just slip stitches, I HAVE to try this! Micawber's Recipe for Happiness: Squiggledy Dishcloth Free Pattern & Tutorial - an Easy Intro to Slip Stitch Crochet
The tie-dye colored yarn used in this Multi Colored Coaster pattern makes these perfect for summertime barbeques! Use worsted weight yarn and a G hook to make these funky kitchen accessories. They would also make a great house-warming gift!