knot

These days, when we eat a lot of food for delivery, it is sometimes embarrassing because the knot of the plastic bag tied to the food cannot be easily untied. If you can't untie the knot easily, first take the knot out of a plastic bag and keep twisting it in one direction. As the knot gets thinner, push it into the opposite knot and pull the opposite knot. The knot is immediately untied. There is no need to use scissors or pull the knot hard.