Your Cuppa Joe
Posted: July 7th, 2011
Ceramic Mugs vs. Disposable Bio Cups – NO CONTEST
Is it better to have ceramic mugs for hot drinks in your office or compostable bio-cups?
We looked at a 300 employee company over the 15 year cycle of the average Energy Star dishwasher. Our findings are pretty staggering.
For those who want the short answer, the ceramic mugs win, hands down.
For those who want the long answer, see below!
WE STARTED WITH ESTIMATES ON CUP USE:
The average disposable cup use for this size organization is a little over 68,000 disposable cups a year for a total of 1,032,330 cups used over the 15 year lifecycle.
For the reusable ceramic mugs, we assumed the company would need 280 mugs and that they would be replaced once during the 15 year lifecycle for a total of 560 mugs used.
THEN WE LOOKED AT IMPACTS
Impact 1: Material Intensity
The material intensity is the amount of ’stuff’ (technical term) in kilograms that needs to be taken out of the earth (ore, coal, clay etc.) to make the Ceramic Mugs and Bio Cups:
It takes 1,340 kg of materials to produce the ceramic mugs and the dishwashers needed
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It takes 242,185 kg of materials to produce the bio cups needed
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Verdict: Ceramic Mugs are 180 times more efficient from the material intesity perspective
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Impact 2: Water Use
How many litres of water are used in the production of Ceramic Mugs vs Bio Cups … including the water used for dishwashing over the 15 year period?
303,352 Litres of water are used to produce and clean the ceramic mugs
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5,863,634 Litres of water are used to produce the Bio Cups
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Verdict: Ceramic Mugs are 19 times more efficient from the water use perspective
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Impact 3: Power Use
How many kilowatt-hours (kWh) of power are needed to produce the Ceramic Mugs vs Bio Cups … including the power used for dishwashing over the 15 year period?
33,169 kWh of power is needed to produce and clean the ceramic mugs
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166,057 kWh of power is needed to produce the Bio Cups
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Verdict: Ceramic Mugs are 5 times more efficient from the power use perspective
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Impact 4: Greenhouse Gas Emissions
How much Greenhouse Gas is emitted (in kilograms) in the production of the Ceramic Mugs vs Bio Cups … including GHGs for running the dishwashers and GHGs emitted by killing trees needed for Bio Cup production over the 15 year period?
6,048 kg of greenhouse gas is emitted in the production and cleaning of the ceramic mugs
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475,743 kg of greenhouse gas is emitted in the production of the Bio Cups
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Verdict: Ceramic Mugs are 75 times more efficient from the GHG perspective
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