A glass container that includes a base defining a hole, and methods of manufacturing and using the glass container, is disclosed. The glass container is manufactured by providing the container and cutting a hole in a wall of the container. The hole may be cut into the wall by any technique in which glass material is separated from the wall including by mechanical shearing, thermal energy, and/or fluid impingement. To use the glass container, a deformable blow-out plug may be inserted into the hole to fluidly seal the hole, a liquid beverage may be introduced into the container, a closure may be coupled to the container to close the container and provide a pressurizable package, and thereafter the package may be internally pressurized by introducing a pressurizing gas into the package.

The present invention provides for synthesizing high optical quality multicomponent chalcogenide glasses without refractive index perturbations due to striae, phase separation or crystal formation using a two-zone furnace and multiple fining steps. The top and bottom zones are initially heated to the same temperature, and then a temperature gradient is created between the top zone and the bottom zone. The fining and cooling phase is divided into multiple steps with multiple temperature holds.

The present invention provides a method for synthesizing high optical quality multicomponent chalcogenide glasses without refractive index perturbations due to striae, phase separation or crystal formation using a two-zone furnace and multiple fining steps. The top and bottom zones are initially heated to the same temperature, and then a temperature gradient is created between the top zone and the bottom zone. The fining and cooling phase is divided into multiple steps with multiple temperature holds.

A glass composition formed of a glass frit including P.sub.2O.sub.5, SiO.sub.2, B.sub.2O.sub.3, Al.sub.2O.sub.3, ZrO.sub.2 and group I-based oxide, wherein P.sub.2O.sub.5 is contained in an amount of 20 wt % to 40 wt % based on a total weight of the glass frit, SiO.sub.2 is contained in an amount of to wt % to 30 wt % based on the total weight of the glass frit, B.sub.2O.sub.3 is contained in an amount of 3 wt % to 20 wt % based on the total weight of the glass frit, Al.sub.2O.sub.3 is contained in an amount of 7 to 24 wt % based on the total weight of the glass frit, ZrO.sub.2 is contained in an amount of 1 wt % to 7 wt % based on the total weight of the glass frit, and the group I-based oxide is contained in an amount of 7 wt % to 28 wt % based on the total weight of the glass frit.

A glass composition formed of glass frit including P.sub.2O.sub.5, TiO.sub.2 and group I-based oxide, wherein P.sub.2O.sub.5 is contained in an amount of 20 wt % to 30 wt % based on a total weight of the glass frit, wherein TiO.sub.2 is contained in an amount of 10 wt % to 20 wt % based on the total weight of the glass frit, and wherein the group I-based oxide is contained in an amount of 15 wt % to 30 wt % based on the total weight of the glass frit.