Susan, I don’t know about the specific bottle you are mentioning but
silver film is deposited on glass beads by the process of fuming and
silver layer is deposited by use of silver foil or leaf.
Fuming is, according to the beadmaking books, uses a tiny ball of
silver about the size of a solder ball that one would use in soldering
a ring shank is first stuck to a quartzglass rod. The metal is heated
in a moderately hot flame until it vaporizes and is deposited onto the
bead which is held in the higher cooler part of the flame, using
welder’s shade #6 eye protection and proper respiratory protection.
I have never done this so I can’t give more details. A better
description is found in “Contemporary Lampworking” by Bandhu Scott
Silver foil and leaf are much easier to use. The molten bead is just
rolled onto the silver which as been laid on a graphite marvering
block then cased in clear glass. I have done this many times and it is
about as easy as any other basic technique and not more dangerous,
using regular AUR92 lenses and good ventillation. A better description
is found in “Making glass Beads” by Cindy Jenkins.
Neither technique can be taught over the internet, so a short
hands-on course in lampworking would be the safe way to approach them.