A TON OF REASONS… here are a few…
It doesn’t rust, it doesn’t tear apart, it bends rather than breaks, it expands and contracts with heat and cold, it will last 100s of years without falling apart, and can be recycled over and over and over.
This isn’t weakling packaging! It’s thick and sturdy and because of that you can preserve your water from Water Vapor Transferring (WVTR) that occurs with store-bought bottled water or even aluminum pop cans. If you leave store-bought bottled water or aluminum pop cans on a shelf long-enough, the water vaporizes through the pores of the bottle and through the seams and thin skins of the pop cans, and your water supply gets lower and lower. And, with pop cans, it doesn’t help that the carbon-dioxide or the nitrogen gas creates pressure from the inside out, causing the water to escape even faster over time.
HDPE is actually one of the safest plastics and is FDA approved for potable water. Because of its high density nature, you don’t have the plastic chemicals leaching into the water like you would from a cheap plastic. That’s why HDPE is used for long-term water-storage tanks, such as those 55-gallon storage drums we’re familiar with.
This almost goes without saying, but if you leave a can of water out long enough it can rust from from the outside in and from the inside out. All it takes is for water to work itself into the seams of a metal can over time, and eventually the water seeps out.
Less Weak Points
The more seams, the more weak points, and the more chances of your water escaping over time or becoming contaminated. For example… Pouched water has seams sometimes on all four sides. A metal can has seams at the bottom (a very bad place for a seam!) and on the top. An aluminum pop can has seams around the top edge and another seam where it pops open (a very thin, weak seam, mind you!). But, thick HDPE plastic bottles are seamless. There is only a hole at the top that is sealed by induction and then a tight lid keeps it all in place for decades without the worry that water will eventually “seap” out of its seams.
As much as you think the aluminum in an aluminum can won’t get into your water over time, it’s not true. The aluminum gets in and heavy metals in water make the water un-healthy and sometimes un-safe.
Because of the thickness and the density of the HDPE (“High-Density” Polyethylene), water doesn’t get out and water doesn’t get in!! Try soaking a can in water over time (especially salt water), and see what happens (not a good thing!). Being water proof means that your emergency water is protected from the corroding effects of basement flooding or even something as simple as humidity in the air.
Yes, importantly, it’s BPA Free. Most cans can’t claim the same simply because of the food-grade coating they use on the inside of the cans.
One of the biggest flaws in cans are dents. When a can is dented, two bad things can happen. First, you create weak points or even cracks in the interior or exterior liners. This causes rusting over time for metal cans, and causes aluminum to enter the water with pop cans. Second, when you dent the bottom or top edges of a can, you have just weakened or maybe even ruined the seamed of the can. One small dent on the seam and your water can be ruined for life (which is bad if you plan on staying alive in an emergency situation). Dents aren’t an issue with sturdy HDPE bottles like Puravai uses.
Thick HDPE plastic doesn’t tear like pouched water does. So, it is safe to put in a 72-hour kit or let it roll around in a trunk or anything else. These bottles are tough!
Reusable in Emergency Situations
A very beautiful thing about HDPE bottles is that it comes with a reusable cap. That means in an emergency, Puravai bottles can be used again and again, drinking from the bottles and then refilling them where needed, like a canteen. In fact, we make our bottle from the same materials the U.S. military uses to make their canteens. You can’t say the same for pop-topped cans, opened metal cans, or torn-open pouches.
HDPE plastics are one of the most recycled plastics in the world and can be used and reused again. Did you know that even your store-bought gallons of milk are made from HDPE?
It Can Float!
This is a big plus for emergency water, because you precious water supply is protected against flooding, rivers, lakes, or oceans. Emergency water that floats means an extra level of security in a variety of emergency situations and a great backup water supply for the U.S. Coast Guard and the Navy as they travel in the open waters.