One Drop at a Time. Our natural plastic dropper bottles include natural plastic ribbed caps and controlled dropper tip inserts for every bottle. These LDPE dropper bottles could be used to dispense pharmaceutical, chemical, or liquid food products in small measurements. Tip Lengths: 3 cc Dropper Bottles: 8 mm Tips, 6 cc Dropper Bottles: 13 mm Tips, 10 cc Dropper Bottles: 13 mm Tips, 15 cc Dropper Bottles: 15 mm Tips.