you mean ornamental glass made in Bohemia in the late 19th Century - the glass has a striated overlay of glass filaments in a different colour
Most doctors believe half a glass to a full glass of red is ok, but every individual situation is different and i suggest you ask your individual physician
Yes all glass can be recycled. The colour of the glass is of a consideration in its ultimate reuse. Clear glass generally segregated from all coloured glass and recycled into clear glass products. Coloured glasses may be accumulated for specific colour uses. Mixed glass will be reused for "brownish" glass uses or for processing into materials such as Fiberglas insulation where colour does not matter.
Glass itself does not have a color, it appears transparent or colorless. The colors we see in glass are due to impurities or additives added during production.
Glass can be made into an colour by adding the appropriate materials into it.
clear
Glass color is added during the manufacturing process by incorporating metal oxides or other colorants into the molten glass mixture. Different metal oxides create different colors in the glass, with cobalt oxide producing blue, chromium oxide creating green, and manganese oxide yielding purple, for example. The amount and type of colorant used will determine the final hue of the glass.
red
Cobalt
grey
purple
metallic oxides such as those of copper, cobalt, etc are used to color glass.