How do you calculate my potential financial and sustainable savings?

On our website homepage, and on our customised bottles (for businesses) page, you will see a calculator widget (called 'Calculate your impact') which helps you to estimate how much could you save (financially and sustainably) in a year, buy buying a Dopper bottle.

Here is how we calculate the results:

Calculator for individual customers

Annual cost savings	(Weekly water intake * SUP Bottle cost per liter * Weeks per year) - (Dopper Bottle cost / Lifespan) - (Weekly water intake * Tap water cost per liter * Weeks per year) = €/year
Annual carbon footprint savings	(Weekly water intake * SUP Bottle footprint per bottle * SUP Bottle quantity per liter * Weeks per year) - (Dopper Bottle footprint / Lifespan) = kg CO2e/year
Annual plastic savings	(Weekly water intake * SUP Bottle weight per bottle * SUP Bottle quantity per liter * Weeks per year) - (Dopper Bottle weight / Lifespan) = kg/year

Calculator for business customers

Annual cost savings	(# of Employees * Working days per year * Daily water intake per employee * SUP Bottle cost per liter) - (# of Employees * Dopper Bottle cost / Lifespan) - (# of Employees * Working days per year * Daily water intake per employee * Tap water cost per liter)
Annual carbon footprint savings	(# of Employees * Working days per year * Daily water intake per employee * SUP Bottle quantity per liter * Footprint per SUP Bottle) - (# of Employees * Dopper Bottle footprint / Lifespan)
Annual plastic savings	(# of Employees * Working days per year * Daily water intake per employee * SUP Bottle quantity per liter * Weight per SUP Bottle) - (# of Employees * Dopper Bottle weight / Lifefspan)

References:

Avoided single-use plastic water bottles, thanks to a Dopper = 104 bottles / year (Dopper Impact Research 2023)
Dopper bottle lifespan = 5 years (Dopper Impact Research 2023)
Dopper bottle carbon footprint = 0,14 kg/CO2e per bottle (internal calculation)
Dopper bottle weight = 0,10 kg
Dopper bottle price (including VAT) =
- Original (450 ml) - 14,95€
- Insulated (350 ml) - 32,95€
- Insulated (580 m) - 37,95€
- Insulated (1 L) - 44,95€
- Steel (350 ml) - 18,50€
- Steel (490 ml) - 21,95€
- Steel (800 ml) - 29,95€
- Steel (1.1 L) - 32,95€
Working days per year = 229 (Octagon Professionals)
Daily consumption of mineral water = 0,85 L/day (RIVM)
Packaged water cost = 0,66 €/liter (internal calculation based on raw data bought annually from NielsenIQ)
0,5 L single-use plastic bottle - Pieces per liter = 2
0,5 L single-use plastic bottle - Carbon footprint = 0,07 kg CO2e/pce (internal calculation)
0,5 L single-use plastic bottle - Weight = 0,03 kg/pce
Tap water cost = 0,22 cents/liter (Vewin - Tarievenoverzicht drinkwater 2023)

Note: most references are about the Dutch population (the Netherlands) - not about the worlwide population.

If you have any question about our calculation method and references, please contact us at: info@dopper.com