Our monogrammed double wall cups make the perfect cup to go and a great personalized gift for giving! They hold just the right amount of liquid and fit conveniently into most standard sized cup holders. Their screw on top is lined with a rubber seal, making them virtually spill proof and the straw makes drinking on the go easy! The monogram is made of a vinyl material that adheres to the cup and is water proof. Because of the make of this cup, it is suggested that it be hand-washed.