Janine is considering buying a water filter and a reusable water bottle rather than buying bottled water. Will doing so save her money?

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How much water does Janine drink in a day? She normally drinks 6 bottles a day, each 16.9 ounces.
How much does a bottle of water cost? She buys 24-packs of 16.9 ounce bottles for $2.69.
How much does a reusable water bottle cost? About $10.
How long does a reusable water bottle last? Basically forever (or until you lose it).
How much does a water filter cost? How much water will they filter?
A faucet-mounted filter costs about $28 and includes one filter cartridge. Refill filters cost about $33 for a 3-pack. The box says each filter will filter up to 100 gallons (378 liters)
A water filter pitcher costs about $22 and includes one filter cartridge. Refill filters cost about $20 for a 4-pack. The box says each filter lasts for 40 gallons or 2 months
An under-sink filter costs $130 and includes one filter cartridge. Refill filters cost about $60 each. The filter lasts for 500 gallons.

Which option is cheapest over one year (365 days)?

Select an answer

Water bottles

faucet-mount filter

filter pitcher

under-sink filter

The cheapest option saves her $ over a year.

Give your answer to the nearest cent. Pro-rate the costs (so if you only use half of a filter pack, only count half the cost).

1560

1640

1720

1800

1880

1960

2040

Distribution of Prices