A hoop house is basically a metal frame covered with plastic or other all-weather material.

VOA: special.2009.12.22

And the Extension Service at North Dakota State University offers other advice: Do not save plastic bags of food even if boxes or containers inside the bags appear dry.

VOA: special.2010.07.19

Turtles choke on plastic bags and other garbage dumped into the ocean.

VOA: standard.2010.07.15