Glass bottle for containing liquid

A bottle for containing liquid, the bottle comprising:

• a single-piece glass body comprising a base, a cap-engaging portion and a neck;
• the cap-engaging portion defining an opening of the bottle and configured to engage with a bottle cap;
• the neck comprising a top end and a bottom end, the top end of the neck being adjacent the cap-engaging portion;
• the neck further comprising an inner surface that defines a channel between the top end and the bottom end;
• the base extending from the bottom end of the neck and comprising a liquid-containing space therein;
• and
• at least one inwardly-protruded spiral guide formed on the inner surface of the neck and configured to guide at least part of liquid to spirally flow through the channel when discharging liquid from the liquid-containing space, wherein the at least one inwardly-protruded spiral guide generally spirally extends about a central axis of the bottle that passes through the channel and the liquid-containing space,
• wherein a cross-section of the base taken in a plane perpendicular to the central axis is generally circular and has an inner diameter, wherein the base has a level at which the inner diameter is largest, wherein the at least one inwardly-protruded spiral guide continuously extends from the top end of the neck to the base passing the level at which the inner diameter is largest.