It is best to use plain brown cardboard boxes. Dyed packaging is fine too, but avoid anything with a glossy coating. The shiny layer is typically made from plastic that won't break down into the soil.

Online retailers are giving the humble cardboard box an extreme makeover, transforming a six-sided receptacle for delivering goods into the new shopping bag. Out: brown, plain, boring. In: neon ...

By America’s Test Kitchen Published: January 30, 2019, 6:05am Share: 2 Photos Real Buttered Popcorn (Joe Keller/America’s Test Kitchen via AP) Photo Gallery ...

With the cardboard box flat, tape the edges of the cut flaps together. Then, open the playhouse back up and reinforce with tape along the side seams. Image: SheKnows Image: SheKnows 10.

1 tablespoon unsalted butter 1/4 teaspoon salt Place popcorn kernels in clean brown paper lunch bag. Drizzle kernels with oil. Fold over top of bag three times to seal (do not tape or staple).