One 12 count package of 5.5 inch Clear Test Tubes. Each tube holds 1.5 ounces of liquid. These plastic tubes let your guests get scientifically creative with drinks. Set up an area with different fruit juices so everyone can mix their own crazy concoctions. These Clear Test Tubes are fun favor containers, too. Fill them with confetti, tiny candies, or sunflower seeds, and tie a ribbon around the neck. Eureka!