Dawson 12-Head Filler with Integrated 4-Head Capper This is an used Dawson 12-Head Filler with Integrated 4-Head Capper. This Dawson 12-Head Filler with Integrated 4-Head Capper is suited for standard HDPE Round Plastic Milk Bottles and this Filling Machine was previously used for filling 250ml & 1-Pint Plastic Milk Bottles. This Dawson 12/4 Filler has a control panel mounted on it with Frequency Controlled Inverter for Speed Control.