That may be the case, but my objection to cartridges is not just because of the cartridges alone.
Its the cumulative effect of the energy that is used to extract the metal to manufacture the canisters, pump the CO2 into them, and then the energy cost of transporting them around by road or sea.
All of this just to save 2mins of your time.
You may disagree, but I think that is an unnecessarily wasteful expenditure of energy.
As arte has said - a good pump will easily get you up to what you need.
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