Cans are less expensive than bottles to buy, are lighter to post, more compact to post, and are less fragile than glass bottles. They block out light entirely and are easier to package as near oxygen free even without counter pressure filling. The cans are totally recyclable. They are easy to prepare for use, a quick spray of Starsan solution, and can be used to package ad hoc rather than a specific session. They also take up a lot less storage space than bottles do.
I'll illustrate their merits when considering a request from my son who asked if I could supply a keg for a party in a few weeks time. A full size corny keg won't fit in a fridge, and needs a gas supply, with a flow adjustable tap. A smaller 5 litre keg which might fit in the fridge, is equivalent to about 15 cans, or at the cost of the cans above, about £4.65 . A 5 litre keg with flow control is going to be about £140, not including the gas sparklet or larger gas supplies. I'd need to use the keg about 30 times to cover the cost not allowing for gas.
I don't use cans often for my own use, so they are in addition to using kegs, and I still use bottles for bottle conditioned drinks, typically the ciders I make for the family. The biggest pain in the rear end at the moment is finding a supplier at reasonable cost.
That's my tuppence worth anyway
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price double for me.
