Environment Recycling & Waste More Uses for Plastic Milk Bags By Lloyd Alter Design Editor University of Toronto Lloyd Alter is Design Editor for Treehugger and teaches Sustainable Design at Ryerson University in Toronto. our editorial process Facebook Facebook Twitter Twitter Lloyd Alter Updated October 11, 2018 Migrated Image Share Twitter Pinterest Email Recycling & Waste Zero Waste Plastics Image credit Lloyd Alter Many Canadians buy their milk in plastic bags (see Is Drinking Milk From Bags Weird?); next to returnable and refillable bottles, it is probably the greenest way package the stuff. In past posts, some have argued that cardboard cartons are probably better as they are recycled, although plastic bags are as well. But this past weekend I noticed a number of milk bags drying on a line over the sink at a friend's house in Dorset, Ontario. I asked my host Elizabeth what she did with them; she said many things, because they are so strong. Explaining how to use bagged milk She ran through an lengthy list of uses: lunch bagsleftoversfreezing and storing vegetablesfreezing and storing soupstorage of oily rags while finishing furniturestorage of paint brushes Basically, any use that one might use plastic bags for, but because they have to hold and protect milk, the bags are far thicker than a baggie, they are stronger and last forever. Why don't they sell milk this way everywhere? And if you get your milk in bags, what do you do with them? I have usually thrown them out, but Elizabeth has put me to shame.