Home » Demo Tools Atomizer Spray Bottles - 2 Count Details  Two pump style atomizer spray bottles. One blue, one clear. Price: $5.00 Energy Ball Details  Energy Ball for demonstrating the electricity conducting potential of the human body. Price: $7.50   Energy Ball - 3 Count Details  Energy Ball for demonstrating the electricity conducting potential of the human body - 3 count of 6020 (discounted for quanitity). Price: $19.50 pH Test Strips - 80 Count Details  ph test strips for testing saliva and urine. Price: $9.50