Concave Base Champagne Bottles for Pressure Resistance

Let’s cut through the fizz and talk physics: why does every premium sparkling wine bottle have that deep, iconic punt (concave base)? It’s not just tradition—it’s engineering.

Champagne and other traditional-method sparklings routinely hit 5–6 atmospheres of internal pressure—roughly *twice* the pressure in a car tire. That’s ~75–90 psi. A flat-bottomed 750 mL bottle would buckle or shatter under repeated thermal cycling and handling. The concave base isn’t decorative; it’s a structural reinforcement that redistributes stress radially, increases column strength, and improves stackability.

Here’s what lab-tested data shows across 12 major European glass manufacturers (2022–2023):