Champagne glass effect of bubbles rising to the top. The flute's narrow cross-section also minimizes the oxygen-to-wine ratio, which enhances both the wine's aroma and taste. While most commonly used for sparkling wines, flutes are also used for certain beers, especially fruit beers and Belgian lambics and gueuzes. The flute shows off the beer's color, and helps gather the aroma for the nose. The champagne flute is distinguished from the pilsner glass, which lacks a stem. The champagne coupe is a shallow, broad-bowled, saucer shaped stemmed glass generally capable of containing of liquid. Legend has it the shape of the coupe was
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