... paper andink. Best if used in cold beverages. These fun vintage straws are strong and durable and will not get soggy ... drinks. They add the perfect touch to any party table, candy buffet, wedding, birthday, baby showers, briday shower , graduation , holiday ,everyday ... are bio-degradable .On FDA-approved ink .So Retro , So Vintage , So Fun ...!!!. Material:food-graded craft paper.Ink:Food-gratedSize ...