I'm 38 years old, but I have never owned a coaster. It was just the other day, when I was doing my daily clean off of the coffee table that I decided to sit down and make coasters. Who wants to clean glass rings off the coffee table every day? Not me! So here is my basic, most simple, on the fly coaster.
I used cotton kitchen yarn for this coaster.
Size 8 needles.
Cast on 18.
Knit 2 rows.
Row 1: K2, *purl across*, K2.
Row 2: Knit across.
End on 2nd row, about 4 inches long.
Knit 2 rows and bind off. Weave in ends.