Includes: 5 Beads Storage: Refrigerator Each bead contains microorganisms, buffer, salts and nutrient broth in an instantly soluble pellet Stable for at least nine months at room temperature, making them easy to ship to school and store in classroom Instantly soluble in water, Luria Broth or any other microbial growth medium Color-coded for easy strain identification Place one BactoBead on the agar plate, watch it dissolve, and streak for isolated colonies