You're heading out on the trail. Backpack packed, boots tied. You stop at a gas station or a local shop in a mountain town to stock up on water. A crate lands in the trunk, and then you cram the heavy bottles into the side pockets of your backpack.
Sound familiar? Most of us have done it. But what if we told you that water is the most expensive and heaviest item in your gear, which you don't have to carry at all?
Today we're pulling out the calculator to see if the "Zero Waste" fashion in the mountains is just an eco-trend, or perhaps a clear saving for your wallet.
Trail Math: Let's do the math!
Let's set some assumptions for an average hiker. An adult should drink at least 3 liters of water per day during physical exertion in the mountains.
Assume you are planning a 3-day mountain trip for two people.
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Requirement: 2 people x 3 days x 3 liters = 18 liters of water.
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Cost of bottled water: When buying water in small shops at resorts or mountain huts, the price for 1.5L is often about 3-4 PLN. Let's assume an average of 3.50 PLN per bottle. You need 12 large bottles.
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Cost of the trip (water only): approx. 42 PLN.
It might seem like not much. But if you hike regularly (e.g., 10 weekends a year), you spend over 400 PLN annually just on plastic-bottled water!
And now, the filter version
A good-quality travel filter (like the STRAW II available from us) is an expense of around 70-90 PLN. One filter can treat up to 1000 - 5000 liters of water (depending on its level of contamination).
Conclusion: The investment in a filter pays off after just two weekend trips for two people. Every subsequent trip provides pure water (literally and figuratively) for free.
Your spine will thank you (The weight argument)
Saving money is one thing, but comfort on the trail is another. Let's return to our calculations.
Taking a water supply for an entire day for one person means 3 kg of additional load. That's as much as a tent, sleeping bag, and stove combined! Carrying this weight on ascents takes the joy out of hiking and wears out your joints faster.
What does it look like with a filter?
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You take only one empty bottle or hydration bladder (e.g., 0.7L).
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When you pass a stream, spring, or river, you fill your bottle and drink through the filter (or drink directly from the source through a straw).
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You carry a maximum of 0.7 kg instead of 3 kg.
That is 2.3 kg less on your back. You will feel the difference on the very first ascent.
Mountains without plastic – be a hero in your own home (and in the woods)
There is one more aspect that must be mentioned. Bottled water generates mountains of trash. The aforementioned 3-day trip for a couple means 12 empty plastic bottles. Even if you are an exemplary hiker and carry your trash back down (which is tiring, because empty bottles take up a lot of space), they still end up in the bin.
By using a reusable filter, you won't generate a single gram of plastic water waste all season. This is the most tangible impact on environmental protection you can have as a hiker.
Is stream water safe?
Many hikers are afraid to drink water from streams for fear of stomach issues. And rightly so—crystal-clear water can contain bacteria (e.g., E. coli) or protozoa if sheep are grazing on the pastures above.
That is why we do not encourage drinking water directly, "in the wild," without protection.
Mechanical (straw) filters are the solution. They work like a dense sieve that traps 99.9999% of bacteria and parasites. Water flows through microfibers, while contaminants stay inside. This is the technology used by the military and travelers all over the world.
Summary: Why is it worth making the switch?
Giving up bottled water in favor of your own filter is one of those rare situations where you win on every front:
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Economy: The filter pays for itself in no time.
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Comfort: Your backpack is several kilograms lighter.
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Ecology: You leave no carbon footprint or plastic behind.
Ready to start your lightweight hiking adventure? Check out our best-selling STRAW II Filter and see how mountain water tastes straight from the source—safely and for free.