Keep your food dry by using the spout of a bottle as an airtight seal
This hack is perfect for keeping your food dry and preventing moisture from reaching it. Sometimes we just close the package of cookies or cereals with our hands, leaving room for moisture and insects to enter. This problem can be solved very quickly, without spending money.
Just take a plastic bottle of a suitable size and cut off the top. Then, you will put that part of the bottle on the open end of the package, pull the edges through the spout and close the bottle with its cap. This way, the food will be airtightly sealed.