HI again Karon.
I wasn;t thinking of a commercial product. The whipped cream cans i'm talking about are used in ice cream places here, and they put fresh cream in them and the compressed air shoots air into it. Then at the end of the day it's washed out and refilled the next. I would never use one of those cans you buy which even if they have real cream in them, are full of other junk. I think to keep egg whites and sugar in a can to sell ready made, you would have to add all kinds of stuff. I meant something like a seltzer bottle, with a compressed air capsule. You fill it with cream or egg white and syrup and spray.
In the big bakeries, they use a big mixer. I use a kitchen aid at home and making meringue (or whipped cream) is the easiest thing in the world, so i would never buy a thing like that myself. It takes a minute. And easier to wash than a bottle! And you would not have to keep filling it, and no risk of it clogging as the sugar syrup maybe solidifies around the nozzle, etc. But who knows, it might be something people would get a kick out of.
To answer your other question, Siduri is a pen name. I took it because she was the mythological character in Gilgamesh, the earliest written book we have, on clay tablets, from Babylonia. (if we still have it, the library there being destroyed). She appears in the story because Gilgamesh was terrified of dying and went looking for the gods to ask them for eternal life. He meets many characters along the way, but one, Siduri, the tavernkeeper (beer was made by women in those days), told him what is partly quoted at the bottom on my signature line. She tells him to go home, eternal life is not for humans, go back to your wife and child, enjoy them and let them enjoy you, wash, eat, dance, play music, etc. I was so struck by that because we imagine people were so different back in those days, what was it 4000 years ago? dirty, rough, violent, but her advice shows that the things we value now are the same as then. (Gilgamesh was, in fact, violent, but her advice was all the more significant given to him).