It only takes three folds to get the job done and once it's complete, you won't have to roll up the top of your take-out or lunch bags anymore. It's surprisingly secure too, so you don't need to worry ...

1. Take a rectangular origami paper and fold it in half. 2. Then fold it partially, to make a crease on top. 3. Fold the two upper corners to form a triangle. 4. Now fold both the bottom layers of the ...