the reasoning behind the wine bottle punt has as many layers as a good class of burgundy, from stability to an old-timey way of cutting bar patrons off. since wine bottles are stored on their sides, a regular thin-walled bottom could easily break should the bottle be tapped. Also, for champagne or sparkling wines, the punt increases the strength of the bottle a great deal, providing more surface so that the bottle can withstand the pressure of the carbon dioxide gas, making it less likely to burst. the depth of a bottles punt also used to be a marker of value, and some wine manufacturers continue to exaggerate the indents at the bottom of the glass to pass it off as high-quality. Editors note while opinion differs on the usefulness of the wine bottle punt versus its aesthetic tradition, most critics argue that a wines quality cant be judged on the size of the punt. much like a wine glass stem reduces hand contact with the wine, the punt allows the pourer to reduce the surface area of their hand touching the bottles body. The more contact between your hand and the bottle, the more your body heat warms up the wine. A common misconception is that deeper bottle punts mean higher quality wine.