Not hard to do. Make up stamping molds for two or more sides as needed and
use brass as the metal (easily soldered without problems) and solder the
parts together. Don't forget to have a vent hole which gets sealed after
the soldering of the parts together and everything has cooled otherwise you
won't be able to get a seal with the soldering process as there will be a
good vacuum inside.

--
Bob May
Losing weight is easy! If you ever want to lose weight, eat and drink less.
Works every time it is tried!