Peterson Smooth System Spigot Filter Briar Pipe 304 The 304 is a flat bottomed full-bent billiard with a nice deep bowl that gives a generous fill for the size of the pipe yet still smokes smaller fills very well. It feels slightly less dainty than the other pipes in the series and has a flat bottom which enables the pipe to stand unaided while resting which is great for keeping the sideboard clear of ash and you in the good books with the other half.