Lambic bottles are thick walled, reinforced, Champagne styled. Green or dark brown in color. The bottles are filled to the arch of the neck and topped with either a wine or 'mushroom' styled cork. In the case of a wine cork, a metal crown cap is applied to help maintain the carbonation and to prevent the cork from popping out during the production of CO2 within the bottle.
Bottles are left unlabeled until time for sale. Bottles are left for a minimum of three months, though most blenders prefer to age their bottles for minimum six months before sale, especially in the case of geuzegueuze. This will allow bottle conditioning to occur, and allow the beer to work through phases of viscosity that may occur (Pediococcus byproducts known as 'ropiness').
==References==