This may be a plastic sachet or plastic bottle. The milk sachets or bottles are filled, then placed in a hot water bath or spray with or without agitation. See, for example, the in-pouch pasteurising system described in the poster paper on the Village Milk System that you will receive together with this paper. Milk packaging Pasteurised milk, after cooling, has to be packaged immediately. For batch pasteurisation installations of up to 2000 litres per day, manual plastic sachet sealing machines may be used at the rate of up to 300 sachets per hour.
Sachets are usually pre-formed and sealed on one end.
Semi-automatic versions with mechanised dosing of the milk are available from different manufacturers. Full automatic versions that form and fill various sizes of plastic sachets from a roll are available. Unlike the pre-formed sachets, the automatic form and fill versions provide and opportunity for disinfecting the plastic film before milk is filled in. Batch pasteurised milk may also be filled in plastic or glass bottles or 3 - 5 litres plastic gallons and capped with aluminium foil, screw or cork cap. Bulk vending After batch pasteurisation and cooling milk may be sold in bulk via bulk vending machines.