Saved this for he coasters but there are a bunch of other patterns attached to this link.
Crochet Coasters Free Patterns and Instructions: Collection of easy crochet coasters, flower coaster, animal coaster, coaster applique / motif design
Crochet Roller Coasters - Photo Tutorial & Pattern finally the perfect circle!
Beautiful crochet mandala pattern This would make a great trivet! Just use a thicker yarn.
Crochet Coffee Mug Coaster Free Pattern - Crochet Coasters Free Patterns - Crocheting Atlas