When you are quoted by one cocktail glass manufacturer, you could ask them which quality standard they are offer. This helps you to get the right cocktail glasses. Below is the
Cocktail Glass Quality Standards
| Grade | Part | Quality Standards |
|---|---|---|
| Special Grade | Cup Body | Within 20mm from the mouth: No bubbles or specks allowed. Below 20mm: 1 bubble of 1mm allowed, 1 unobvious stripe. (Note: Only one of the above issues is allowed on the cup.) |
| Stem | No bubbles or impurities allowed. | |
| Base | 1 bubble of 1mm allowed. | |
| Grade A | Cup Body | Within 20mm from the mouth: 1 bubble of 0.8mm allowed. Below 20mm: 1 bubble of 1.2mm allowed, 1 unobvious stripe. (Note: Only one of the above issues is allowed on the cup. 2-3 sparse specks allowed.) |
| Stem | 1 bubble of 2mm allowed. | |
| Base | 1 bubble of 1.2mm allowed. | |
| Grade B | Cup Body | Within 20mm from the mouth: 1 bubble of 1.2mm allowed. Below 20mm: 1 bubble of 1.5mm allowed, 1 unobvious stripe, 3-4 sparse specks allowed. |
| Stem | 1 bubble of 3mm allowed. | |
| Base | 1 bubble of 2mm allowed. | |
| Grade C | Cup Body | Within 20mm from the mouth: 1 bubble of 1.5mm allowed. Below 20mm: 2 bubbles of 1.5mm allowed, 2 unobvious stripes (but not crossing), bubbles and flow lines should not be on the same surface, 3-4 sparse specks allowed. |
| Stem | 1 bubble of 5mm allowed. | |
| Base | 1 bubble of 2.5mm allowed. |
source: lida
