This tutorial is a really quick way on how to make your own Ziploc bag with the use of a plastic bottle and any open bag with a hole needing to be sealed for future use.
Step 1: Step 1: Sealed Bag
Take any bag with a hole in it that needs to be sealed (i.e. a bag of rice). Simply seal the bag and minimize the amount of air in the bag by squeezing the empty part of the bag.