21.   Tinted glass has color added to it during the manufacturing process.

22.   Turning philosophical, Vidler noted that the German critic Walter Benjamin once wrote that glass has no aura.

23.   Whether the bottom of the netting attaches to the floor or to the top of the glass has yet to be determined by the individual rinks.

24.   White-wine glasses have a smaller bowl and are held by the stem to avoid warming the wine.

25.   Wine glasses have long, slim stems, or short, colorful ones.

26.   Laminated glass has a plastic protective layer between two sheets of glass.

27.   Each glass has a microchip and a thin radio-frequency coil in its base, and its sides are coated with a thin, transparent conductive film.

28.   Every glass has its own ID, and its charge is provided by a radio frequency signal also provided by the table coil.