The doorstep delivery system could be under threat as Brussels reviews the targets in the Packaging Waste Directive. The review could damage the image of bottles as environmentally friendly, increase the cost of compliance, and so give a further boost to multiples' share of the milk market. A detailed study has concluded that "reuse should not be encouraged for beverage packaging". If reuse systems are used for beverages, says the report, PET bottles are preferable to glass. There could be further restrictions by requiring reusable bottles to be defined as those making 12 to 18 trips, and requirements on cleaning systems and disposal of effluent. Milk producers fear the doorstep delivery system could lose the support of environmental pressure groups and be attacked by specialist operators and online grocery services. The Dairy Industry Federation has challenged the report's findings with the DTI. {{M/E CANNED GOODS }}