The Real Cost of Buying Bottles

Most people don't add it up. A 6-pack of 1.5L bottles at Mercadona or Lidl costs around €2.50–€3.50. A family of two gets through at least two packs a week — often more in summer. That's €5–€7 a week. It doesn't feel like much until you look at it over a year.

The Annual Bottle Bill — A Typical Household of Two

Weekly purchase (2 x 6-pack)Average cost per purchase
~€6/week
Annual spend on water alone52 weeks × €6
€312/yr minimum
Premium or sparkling water buyers2 people, mixed still/sparkling, summers included
€480–€600/yr
Cooking with bottled waterPasta, rice, coffee — many households do this
+€80–€120/yr
5-year totalWater that just comes out of the tap in any normal country
€1,500–€3,000

And that's before you count the plastic, the fridge space, the supermarket trips, the lugging, the recycling runs, and the mild environmental guilt every time you pile another dozen empty bottles into the bag.

How It Accumulates Over Time

Year 1
267 bottles
~€480 spent
Year 2
534 bottles
~€960 spent
RO System
Pays off
At month 10
Year 3–5
Saving
€390+/yr profit
5 Years
~1,330 bottles
€2,400 vs €849

The Plastic Problem

Spain produces more plastic bottle waste per capita than almost any other European country. Tenerife's recycling infrastructure, while improving, has limited capacity — and a significant proportion of plastic still ends up in landfill or the ocean. Every litre of bottled water you buy contributes to a problem the island is actively trying to address.

1,300+
Plastic bottles an average Tenerife household goes through in 5 years of buying water
500yr
How long a standard PET plastic bottle takes to decompose in landfill
0
Plastic bottles produced per year when you switch to an RO water filter
Plastic water bottles for sale in Tenerife supermarket — the weekly cost of not having a water filter
The weekly shop. A cost most Tenerife households accept without questioning — until they do the maths.

Is Bottled Water Actually Better?

Most people buying bottled water in Tenerife assume it's significantly better than the tap. But where is that water actually from? The most popular supermarket brands in Tenerife are sourced from Spanish mainland springs — which means they've been in a plastic bottle for weeks or months by the time you buy them. Studies regularly find traces of microplastics in commercially bottled water, and the quality difference between a good domestic filter and mid-range supermarket water is often negligible — or in favour of the filter.

Filtered vs Bottled — what you're actually comparing

A reverse osmosis system reduces TDS from 500mg/L to under 20mg/L — cleaner than most premium bottled water brands. The water is produced fresh on demand, never sits in plastic, and costs less than 1p per litre. Most bottled water brands hover around €0.25–€0.50 per litre. The filter wins on quality, cost and convenience. It's not close.

One-Time Fix. No More Bottles.

A reverse osmosis system at €399 gives you pure, filtered water on tap — from a dedicated tap fitted right next to your main sink tap. You turn it on, you fill your glass, your kettle, your coffee machine. No trips to Mercadona. No recycling pile. No weekly cost.

Here's how the economics look:

  • RO system cost: €399 installed, one-time
  • Annual filter service: €90/year
  • Cost per litre of filtered water: under 1p
  • Bottles eliminated per year: ~267 (for a 2-person household)
  • Annual saving vs buying bottles: €390+
  • Break-even point: approximately 10 months
It pays for itself before the year is out

Most of our customers are surprised by how quickly the RO system pays back its cost. If you're currently spending €40/month on bottled water, you've saved the full purchase price within 10 months. Every month after that is pure saving — and no more Saturday mornings carrying water from the car park.

Dedicated reverse osmosis tap in a Tenerife kitchen — pure filtered water on demand, no more bottles
The dedicated RO tap. Fill your glass, your kettle, your coffee machine — all from here. No bottles, no plastic, no weekly spend.

Questions We Hear

I only buy a small amount of water — is a filter still worth it for me?
Even at €15–€20/month on bottled water (which is conservative for Tenerife), an under-sink carbon filter at €199 breaks even in around 12 months. And the improvement in tap water taste usually means you drink more, which is the real win. If you're spending €30–€40/month, the RO at €399 makes very obvious financial sense.
What about reusable bottles and a fridge filter?
Fridge filters are better than nothing, but they typically use basic carbon blocks that reduce chlorine and odour only — they don't address the high mineral content (TDS 500mg/L) that's the main taste issue with Tenerife water. Reusable bottles are a great habit, but if you're filling them from Tenerife tap water, you're just carrying the same mineral-heavy water around. An under-sink filter gives you properly filtered water to fill your reusable bottles from.
Is the RO filter as good as the premium still water brands?
In most respects, better. Our RO systems produce water with a TDS of under 20mg/L — lower than most premium still brands and comparable to the best available. It's produced fresh on demand rather than sitting in plastic storage. And it contains no microplastics, which are consistently found in commercially bottled water. The taste is clean, neutral and balanced.
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Ultra Pure Water Tenerife British-owned water filtration specialists. Based in Tenerife South, serving Costa Adeje, Los Cristianos, Arona, Playa de las Américas and surrounding areas.

Make This the Last Case of Bottles You Buy

One installation, one morning, and you never lug water home from the supermarket again. Message us on WhatsApp and we'll have it sorted within a day or two.

WhatsApp Us Now See Pricing →

Based in Tenerife South. Usually installed within 24–48 hours.

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