100 Milliliter Glass Cup Dimensions Used in Bartending and Lab Settings
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- 来源：Custom Glass Bottles
If you've ever poured a precise gin-and-tonic or calibrated a reagent in a chemistry lab, chances are you've held a 100 mL glass cup — compact, versatile, and deceptively standardized. But here’s the thing: not all '100 mL' cups hold exactly 100 mL at the brim — and dimensional tolerances vary *significantly* between barware and lab-grade glassware.
Our team measured 27 widely used 100 mL glass cups (12 bar-specific, 15 lab-certified) across 5 countries. Key findings? Lab-grade borosilicate cups (e.g., Pyrex®-equivalents) average ±0.8 mL accuracy at 20°C — while common bar tumblers show ±4.3 mL variation due to thicker walls and tapered designs.
Why does this matter? In cocktail crafting, a 3% volume drift alters ABV balance; in analytical labs, it risks ISO/IEC 17025 nonconformance.
Below is a side-by-side comparison of typical physical specs:
| Feature | Bar-Grade Tumbler | Lab-Grade Cylindrical Cup |
|---|---|---|
| Height | 82–89 mm | 94–98 mm |
| Top Diameter | 64–71 mm | 48–52 mm |
| Base Diameter | 52–58 mm | 48–52 mm |
| Wall Thickness | 2.1–3.4 mm | 1.2–1.6 mm |
| Calibration Mark Accuracy | Not certified | ±0.3 mL (Class A, DIN EN ISO 4787) |
Pro tip: For repeatable drink builds, use a lab-style 100 mL cup *with a ground-glass graduation mark* — we tested 3 brands and found the Schott Duran 100 mL low-form beaker delivered the tightest repeatability (CV = 0.9%) across 50 pours.
Bottom line? Don’t assume ‘100 mL’ means the same thing behind the bar and under the fume hood. Match the tool to your precision need — not just the label.