The first item you need is a brown paper bag, like the ones from the grocery store, so next time they ask paper or plastic, say paper. Now that you have your bags, and you will need 2 of them one for the potatoes and one for the onions. What you don’t want is to have your potatoes and onions in close proximity, as gases from the onions can hasten sprouting in your potatoes.
If you have a whole puncher it would be easier but I didn't have one so I cut out triangles out along the seams of the bags which worked just as well. I then created a fold down the front and back of the bag and cut out sections in the middle of the bag. Place your produce in the bag and clip shut. Keep it out of direct light and in a cool place. I was amazed at how much longer my potatoes lasted in the bag. Give it a try.
If you have a whole puncher it would be easier but I didn't have one so I cut out triangles out along the seams of the bags which worked just as well. I then created a fold down the front and back of the bag and cut out sections in the middle of the bag. Place your produce in the bag and clip shut. Keep it out of direct light and in a cool place. I was amazed at how much longer my potatoes lasted in the bag. Give it a try.