In Belgium they pour your bottle, leave about a mouthfull, swill it about in the bottle to get the yeast, then give it to you in a shot glass on the side to add to your beer to your own particular taste, as it makes the flavour more bitter.
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In Belgium they pour your bottle, leave about a mouthfull, swill it about in the bottle to get the yeast, then give it to you in a shot glass on the side to add to your beer to your own particular taste, as it makes the flavour more bitter.