Cut the “head” off of the 2 liter bottle. I cut the top off about 4″ down from the spout. I did this so I could accommodate bigger bags of chocolate chips in the future.
Take the lid off of the bottle and pull the empty end of the bag through the hole until you reach the chocolate chips. My bag was about 1/3 the way full. Feel free to cut off the massive excess once pulled through.
Fold back the end onto the outside of the bottle and screw on the lid.