I am looking for freezer safe containers that would store one or two
serving of concentrated stock to be used in making beef soup. The
stock would be chicken broth.

Shape can be cubes/cylindrical or whatever shapes but I want
individual storage, i.e, enclosed containers. I do not want thos
those ice cube trays which has no lid/cover for individual piece and
also I can't get only whhat I want. I'd have to defrost the whole damn
thing.

It doesn't have to be plastic but Iif it is aluminum or stainless
steel it needs to be small so that I can socka it in hot water and
slide the pice out quickly. I'd prefer micrwaving though.

I have done some googling but the only plastic bottle that are similar
size I saw are for chemical sipplies but they have neck that are
smaller than the body - I prefer the cylindrical shape all the way to
the lid so that I can defrost it quickly and slide the frozen piece
out into the pot.

Though I'd prefer something that is not that long, an example of
cylindrical shape (all the way to the lid) is spice bottles shown at
http://www.fantes.com/images/2240spice.jpg

If you have any useful information what to busy from where and would
like to share, that'd be great.