<<sigh>>
kreynolds, I get the impression that you are just looking for reasons to nerf this idea. Saying that making a glass jar that will reliably break is a problem seems like a straw horesman to me. If I was asserting that my adamantium jars would break, then you would be in your rights to be picking my statements appart like that, but I'm not. Never mind that as the glass jar shrinks, the glass it is made of gets thinner by a factor of 1/12. If anything, the problem would be keeping them from breaking during handling. Your arguement seems like smoke to me.
I still don't get why being shrunk would make the item LESS subject to breakage according to your logic. I just have not heard what your logic is. The spell doesn't say that it makes the items more durable, why do you insist that it would not break, just because it is shrunk.
I still assert that being shrunk makes no difference to whether or not the item is subject to breakage. The only reason it would, is because it is lighter, less force would be applied to the glass if it were just casually dropped (as opposed to thrown with some force). On the other hand, the glass would be thinner and more fragile, so I figure these would balance out.
You said "That kinda sounds like it's in a form of stasis, doesn't it? " My response is: not at all. It is not stasis, it is a limited form of polymorph (into cloth). The fire and it's fuel are being turned into something else, so the fire stops consuming the fuel. When the spell is dispelled, everything goes back to normal, and the fire continues to burn. If it is not turned into cloth, the fire would burn normally, and I would argue for the same duration. For example a shrunken torch would still burn for one hour, even if it was now the size of a match. This is my interpretation, but as I said, DM's need to make this decision, not players.
What It sounds like you are saying is that if I take normal flask full of alchemist fire, one that is designed to break, and shrunk it, and hurled it at a brick wall as hard as you could (lets assume this counts as "tossed on solid surface for the sake of arguement), it would return to normal size and NOT BREAK. Do I have this right? Is this your position?