There is provided a method of manufacturing a glass container that can manufacture a glass container, which includes a bubble formed in a bottom portion and independent of the outside, with high yield by accurately controlling the position and size of the bubble.

A method of manufacturing a glass container that includes a mouth portion, a body portion, and a bottom portion, includes: a step of molding a glass container, in which a bubble is not yet formed, from molten glass; a step of forming a bubble-forming passage by pulling out a needle-like member after inserting the needle-like member into a bottom portion of the glass container in which a bubble is not yet formed; a step of injecting air from an inlet of the bubble-forming passage to form a reverse teardrop-shaped internal space, which is widened in the bottom portion from the bubble-forming passage as a starting point, in the bottom portion of the glass container in which a bubble is not yet formed, and to obtain a glass container that includes an internal space communicating with the outside; and a step of closing an inlet side of the reverse teardrop-shaped internal space by flow of not yet cured glass, which is caused by the potential heat of the not yet cured glass, to obtain a glass container that includes a bubble formed in the bottom portion and independent of the outside.

There is provided a method of manufacturing a glass container that can manufacture a glass container, which includes a bubble formed in a bottom portion and independent of the outside, with high yield by accurately controlling the position and size of the bubble.

A method of manufacturing a glass container that includes a mouth portion, a body portion, and a bottom portion, includes: a step of molding a glass container, in which a bubble is not yet formed, from molten glass; a step of forming a bubble-forming passage by pulling out a needle-like member after inserting the needle-like member into a bottom portion of the glass container in which a bubble is not yet formed; a step of injecting air from an inlet of the bubble-forming passage to form a reverse teardrop-shaped internal space, which is widened in the bottom portion from the bubble-forming passage as a starting point, in the bottom portion of the glass container in which a bubble is not yet formed, and to obtain a glass container that includes an internal space communicating with the outside; and a step of closing an inlet side of the reverse teardrop-shaped internal space by flow of not yet cured glass, which is caused by the potential heat of the not yet cured glass, to obtain a glass container that includes a bubble formed in the bottom portion and independent of the outside.

A container extends along a longitudinal axis and includes a base, a body extending axially from the base, and a generally radially outwardly facing external surface having sharply outlined indicia. The indicia includes generally V-shaped depressions having outer slopes, inner slopes, and vertices connecting the slopes. A method of making the container is also disclosed.

A method of infusing silicon dioxide (SiO.sub.2) in a crystalline state into a structure comprising SiO.sub.2 in a non-crystalline amorphous state is provided. In one embodiment of the present invention, a first material comprising SiO.sub.2 is heated to a melting point, converting the SiO.sub.2 from a crystalline state into a non-crystalline amorphous state. A second material comprising SiO.sub.2 is then applied to the first material while the first material is at a temperature that is hot enough to render the first material pliable, but not so hot as to convert the SiO.sub.2 in the second material from a crystalline state into a non-crystalline state. The first material is then cooled slowly over a period of time to relieve internal stresses introduced during the manufacturing process.

A method of infusing silicon dioxide (SiO.sub.2) in a crystalline state into a structure comprising SiO.sub.2 in a non-crystalline amorphous state is provided. In one embodiment of the present invention, a first material comprising SiO.sub.2 is heated to a melting point, converting the SiO.sub.2 from a crystalline state into a non-crystalline amorphous state. A second material comprising SiO.sub.2 is then applied to the first material while the first material is at a temperature that is hot enough to render the first material pliable, but not so hot as to convert the SiO.sub.2 in the second material from a crystalline state into a non-crystalline state. The first material is then cooled slowly over a period of time to relieve internal stresses introduced during the manufacturing process.