Champagne glass modelled on the breast of Madame de Pompadour, chief-mistress of King Louis XV of France, but the glass was designed in England over a century earlier especially for sparkling wine and champagne in 1663. The coupe was fashionable in France from its introduction in the 1700s until the 1970s, and in the United States from the 1930s to the 1980s. Champagne is also served in a tulip glass. The white wine tulip is distinguishable from the champagne flute by its wider flared body and mouth. Some oenophiles prefer the tulip glass, as it permits the drinker to get more of
Glass-to-metal seal glass, the surface has to be properly oxidized. The oxide layer has to have the right thickness; too thin oxide would not provide enough material for the glass to anchor to, too thick oxide would fail in the oxide layer, and in both cases the joint would be weak and possibly non-hermetic. To improve the bonding to glass, the oxide layer should be borated; this is achieved by e.g. dipping the hot part into a concentrated solution of borax and then heating it again for certain time. This treatment stabilizes the oxide layer by forming a thin protective layer of