Understanding Glass: Why not all glass can be crystal

Anyone browsing through the Swiss Bar Shop range will find a fascinating variety: wafer-thin tumblers, unusual designs, and delicate works of art. Why don't we just use a single universal material for our bar equipment?

The answer is simple: because different drinks have different physical requirements. Sometimes a glass needs to radiate pure elegance, sometimes it needs to withstand brute force, and sometimes it needs to withstand extreme temperatures. Here we explain the three “superpowers” of our glass types – and why each one is indispensable for a professional bar.

1. Crystal glass: the aesthetics of heaviness & brilliance

Crystal glass is the classic choice for pure enjoyment. Its special mineral composition gives it a higher density and refracts light more strongly than any other glass.

• The advantage: it stands for maximum value. Its heavy weight conveys quality in the hand. At the same time, the material is hard enough to grind extremely thin rims, which refines the drinking experience.
  
• The perfect use: Crystal is unbeatable, especially for mixing glasses. Why? A mixing glass must be heavy. When you stir a Negroni, the mass of the crystal ensures that the glass stands firmly and securely on the bar without wobbling. In addition, the thick walls provide excellent insulation against the cold.

• The physical limitation: Due to its hardness, crystal is brittle. Very complex, playful shapes are difficult to achieve, as the stresses in the material would be too high.
  

2. Normal glass (lime-soda): The master of mechanics and diversity

This glass is the backbone of every bar. It is more flexible in production and more elastic in structure than crystal.

• The advantage: It can be shaped and pressed excellently. This allows for unusual designs, structures, and retro patterns that would be technically impossible in crystal. It is also very resilient mechanically—it is more forgiving of impacts.
• The perfect use: the classic partner for the Boston shaker. When you tap the glass into the metal cup (“sealing”) and later tap it out again, strong mechanical forces are at work. A brittle glass would suffer here. Normal glass (often with a reinforced base) can easily withstand this “bar violence” and is the robust partner for daily shaker use.

3. Borosilicate glass: high performance for temperatures & design

Forget everything you know about “fragile” glass. Borosilicate is the high-tech material of the modern bar scene. It is extremely light, yet harder and more scratch-resistant than conventional glass.

• The advantage (temperature shock): This glass knows no thermal limits. It has an extremely low coefficient of expansion. This means it can withstand extreme temperature fluctuations without cracking.
• From hot to ice cold: Whether it's a boiling hot Hot Toddy or modern experiments with liquid nitrogen (-196°C), borosilicate can handle anything that would immediately shatter normal glass.
• Delicate designs: Because the material is so stable, it can be blown into wafer-thin, filigree shapes that are nevertheless robust. Double-walled glasses (“floating effect”) are also almost always made of this material, as they remain light and provide excellent insulation.

Conclusion: Form follows function

At Swiss Bar Shop, we don't choose the material at random, but according to the purpose of your drink:

1. Are you looking for feel, weight, and brilliance for stirred classics? Go for crystal.
2. Do you need mechanical robustness for the shaker or love complex structures? Normal glass is your partner.
3. Do you want to play with temperatures (fire or nitrogen) or love feather-light, filigree designs? Borosilicate is the first choice.