 This is for long-term storage. That's what those big blue containers are, the little blue 5-gallon containers. They all have the HDPE on it. Now, if you don't have a lot of money for spending money on that, you can also use a really good rinsed-out 2-liter, 3-liter soda pop bottle. Those work really well as well. Just make sure they're all rinsed out and fill them up with tap water.