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Beer Glassware Base

Narrow Diameter Bases

Narrow bases help beer stay cold

Most heat transfer in a beer glass happens from the top down, unless the walls are super thin. Liquids arrange in layers, the top being the least dense and warmest, and the bottom being the most dense and coldest. If a beer glass is tall & narrow, only the small top surface warms up from surroundings, and the the bottom stays cold. One because the warmer top is a larger distance from the colder bottom, and two because each density layer has less surface area in contact with the warmer beer layer above it.

Since the beer warms up slowly, the carbonation releases more slowly, reducing head creation
Since the beer warms up more slowly, its aroma releases more slowly

Wide Bases

Wide bases are sturdy

Most heat transfer in a beer glass happens from the top down, unless the walls are super thin. Liquids arrange in layers, the top being the least dense and warmest, and the bottom being the most dense and coldest. If a beer glass is wide & short, the beer warms up more quickly. One because the warmer top is closer to the colder bottom, and two because each density layer has more surface area in contact with the warmer beer layer above it. Since the beer warms up faster, the carbonation releases faster (increasing head creation), and its aroma releases more quickly

Round Bases

Round bases release more aroma

Bulb shaped glasses have a lot of surface area. More surface area slightly increases heat transfer from the surroundings. Moreso, it provides more surface area for carbonation to release from the beer to form its head of froth. Carbonation can only undissolve at phase boundaries. Also, a person can cup the base above the stem to warm the beer. This may be appropriate for certain beer styles that need to warm up to release carbonation or aroma.

Stemmed Bases

Stems add elegance and some stability

Glassware with stems provide a wider bottom for glass designs with narrow or round bases. A person can hold the stem to eliminate heat transfer from his/her hand. This may be appropriate for certain beer styles that should stay cold. Finally, stemmed glasses look elegant, which adds to the appeal of a poured beer.

Thick glass Bases

Thick glass bases add stability

This type of base creates a wide bottom to stabilize tall or narrow beer glasses. It flares out and is made of thick, solid glass to add weight. The added weight lowers the center of gravity and the flare gives it a wider tipping point. These are beneficial when pouring beer in or if it's bumped accidentally.

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