Tap water over bottled water

Bottled mineral water: 0.30-0.50 € per liter. Tap water: 0.0015 € per liter. A 4-person household saves 500-800 € yearly by switching.

Step by step

Tap water is daily-monitored (strict quality standards) and one of Germany's most reliable infrastructures. Bottled water: plastic transport, chilled storage, logistics, profit. Bottle costs (returns, cleaning) are ~0.05 € per liter. The rest is margin + ads. German tap water is one of the safest and purest foods ever, sometimes better-tested than bottled. Cost: turn the tap. That's the truth behind the bottled water myth. Even upscale mineral water brands cost 0.40-0.80 € per liter in Germany, tap water costs 0.002 € per liter. That's a 200-400× difference. Nobody notices on the monthly bill because bottled is cents per bottle. But 1,000 liters per person yearly makes the gap dramatic.

Step by step

1. Filter tap water (optional, not required)High lime content? Simple filter (~20 € + replacement filters ~10 € every 2 months). Taste improves, health gain minimal.
2. Buy reusable bottlesGlass or stainless steel: ~10-20 € per bottle, lasts 10+ years. Fill with tap water, take it along. Zero plastic waste.
3. Cold water: overnight in the fridgeTap water is room temp. Put a glass in the fridge evening → cold morning. Or Sodastream for fizz.
4. Talk to family about switchingKids: 'But bottled tastes better!' Blind taste test with them: bottled vs. tap. Most can't tell.
5. Build new drink habitsNot 'buy water' now 'refill bottle'. Habit shift takes 2-3 weeks, then automatic.

Worked example

How much bottled water do you buy monthly? Calculate your tap water savings.