How to easily seal a chip bag

1 you take a straw and cut it in half

2 then, you take the chip bag ( for example Doritos ) and you flatten the air out of it

3 after that, take the other straw and roll the empty part of the bag around it

4 last, take the cut straw and place it around the rolled up part of the bag ( if you didn't get what I'm saying, look at photo in the back)

This is a example of the part where you roll the bag up. I don't have a picture for the last part, but enjoy anyways!!