Paper Straws (Party Straws) by Retro Sally are top tier in quality. These straws are made from 100% food grade ink. They are 100% biodegradable. And people say they are 100% awesome. They have been tested in many liquids (water, pop, milk, milkshake, energy drinks, adult beverages) and last longer than any other paper straw you can find on the market. If you"re throwing a party, let Retro Sally Party Straws take care of giving your guests a "wow" factor. They are great for kids birthday parties!