OK, so I just found a metal (steel) tennis ball canister that I didn't realise (or had forgotten) was 'laying about the place'...
Anyway, the long and the short of it is, due to the constriction at the top of the canister, it will not accept the PM, or similar 5oz capsules

Diameter of the tube itself is fine, but for some reason, they have this constriction at the top....
This may well be why I had discounted this idea earlier, & simply forgotten about it..
Noah's Ark 5oz'ers will go in there (smaller OD cap.), but they are not a 'neat fit' in the tube...
I had also looked at the plastic ball canisters early on, and didn't like 'em for a couple of reasons,
namely, too flimsy for my liking (considering the weight they would hold), and the tapered bottom (too unstable to be stood upright).
So, in a nutshell, it looks like my 5oz'ers will remain in the good ol' 'tucker tins' for a while yet :lol:
