Comprehensive Profile: Guinness Gravity Pint Glass (20 oz / 568 ml)

1. Structural Design & Geometry

• Silhouette Profile: This glass features a stylized tulip contour known as the "Gravity" design. It is explicitly engineered to flare out smoothly near the upper midsection before tapering back slightly inward toward a rounded rim. 

• The Physics of the Shape: The wide bowl provides sufficient headspace for carbonation and aromatic expansion. The narrowing neck and expanding walls are designed to optimize the physics of nitrogen-filled bubbles. Because nitrogen gas is less soluble than carbon dioxide, the fluid dynamics of this specific shape force the bubbles downward along the outer glass walls while rising up the center, fueling the iconic visual cascade effect. 

• The Weighted Base: The glass features a heavy, thick clear glass base to lower the center of gravity, reduce the risk of accidental tipping, and enhance structural durability in a commercial pub environment. 

2. Graphic & Embossed Elements

• Front Decoration: Screen-printed with a durable multi-layered enamel decal containing:

  • The official Gold Brian Boru Harp trademark emblem positioned centrally approximately 2–3 cm below the front rim.

  • The bold, high-contrast white text brand identifier "GUINNESS".

  • A smaller secondary gold text line reading "BREWED IN DUBLIN" or historical timestamps like "ESTD 1759" directly below the main logo block. 

• Reverse Side Decoration: Features a large, seamless 3D embossed glass harp molded directly into the glass wall. This element provides a physical, tactile point of reference. It serves as a visual guide for the traditional two-part nitrogen pour (the bartender angles the glass at 45 degrees, aims the tap spout directly at the embossed harp, and fills up to that marker before allowing the stout to rest and settle for approximately 119.5 seconds).

3. Factory Verification & Regulatory Markings

Commercial trade glasses utilize strict industry stamps on the side walls to meet legal weights and measures requirements:

• Calibration Number Stamp: Features an official stamped circular or stacked matrix label. The top number represents the manufacturing batch control code assigned by the factory. The bottom number represents the year of manufacture (for example, a stamp reading 13 designates a production standard year of 2013).

Weight: 0.124