'Alive' pints

[Sippo]

Is it true that the stamp in the bottom of pint glasses make the pint more lively? Or is some muggy cunt fobbing me off?

All pubs should clean their pipes on a regular basis. Nothing worse than a shit pint.

[Samdy Gray]

Supposed to stop the fizzy stuff from going flat for longer.

[ron dodgers]

I believe they proved that the bubbles were cause by dirt and "holes" or imperfections in the glass so maybe you are right

[Barry Scott]

Learn something new everyday.

Nucleated pint glasses
Nucleated base of a pint glass.

It is increasingly common to find pint glasses which contain markings on the base; very often these glasses are branded to one particular beer. The markings themselves are formed from small pits which aid in nucleation, allowing the gas within it to more readily release and thus preserve the head. Without the aid of these pits a regular pint glass will keep a head for only 3 or 4 minutes before appearing 'flat'.[9] The markings come in a variety of styles ranging from a simple circular or square hatched pattern to more complicated branding messages

http://en.wikipedia.org/wiki/Pint_glass

[BANGKOK RED]

I remember in chemistry at school putting stuff in the bottom of test tubes to avoid "bumping"

Perhaps it is something along the same or a similar principle.

[axs]

It's the same reason champagne doesn't fizz up in a wet glass, no nucleation points as the glass is covered by liquid.

[donkey]

QI covered this a while ago.

[THE FLASH]

In the olden days in the 90s our Landlady got a bloke in to engrave the bottom of the glasses to do the same thing.

[Colin Todd]

The "nucleated" pint glasses are miles better.

A highly scientific expriment at home with a Stella pint glass "borrowed" from a pub and a bog standard supermarket one proves that the pub glass offers a far superior pint at home.