I suspect you're gona go down "The Rabbitt Hole"....... as most of us do. Even after all these years of building cans and mosaics, my mind still jumps around sometimes like I have ADD.
The possibilities are endless..... if you can think it, it can be make in steel/a can. I went through a period of time for nearly 2 years where I think I might have made 8-10 knives..... all the rest of my time was spent making ranchers' brands in mosaic/cans, and then making everything from belt buckles (made a BUNCH of those), to pendent and earring jewelry, to Mosaic Damascus conchos for saddles/halters. Why? Because for their brand in a belt buckle these people were willing to pay just about anything I'd quote! I once made one for a worker at Hank Williams Jr ranch...... fairly intricate design, but nothing too terrible...... after drawing it up and showing it to the individual, before I could even quote a price, he pooped off and said...... "WOW!! That's about $2,500 worth!" OK..... so it is.
Doing that kind of work had far better margins than knives...... usually the steel required for a single medium knife blade, would produce 1-2 belt buckles, and several smaller pieces for jewelry........ and even that was crazy...... the gals were willing to plop down BIG bucks for the ranch brand in earrings!
OK, gabbing aside, think of building a can, kinda like a puzzle..... only REALLY deep. I have successfully used super glue to hold piece together in a can....at least until the powder fills in a wedges thing in place, but you can also tack weld pieces....but do it on the ends, which you will have to cut off/waste later. Speaking of waste...... be prepared, when building a can, and getting into usable blade stock (that means accordion folding), expect about 70%+ waste/loss. That's one reason it so costly in it's finished barstock state. After I discovered "Fossil" Damascus, where I use the "triangles" cut from accordion folding a billet, that waste has dropped some....to about 50%. Why so much? Well, expect to loose several inches of a finished can on each end, the materials that is milled/ground off when cleaning it up, and all the saw swarf from accordion cutting. And of course, there are always those billets that just refuse to NOT have a void or crack somewhere, and you end up with 1/2-3/4 of it in the scrap pile.
Again..... have fun with it! It's an awesome journey!!