Acrylic:
Pros:
durable, can be made in a wide variety of colors and finishes
Cons:
many find it hard and unyielding, but there are grades that can be as soft as vulcanite, doesn't play well with alcohol, exposure to which causes minute stress fractures.
Vulcanite or Ebonite:
Pros:
cheap, durable, easily carved, slightly soft and yielding, great chew toy
Cons:
Needs maintenance, exposure to light causes discoloration and oxidation, comes in basic black or cumberland, lower grades will develop a sulfur stench and have a gritty texture, great chew toy
Reeds:
Pros:
Great for that pile of tobacco leaves you and the members of your tribe have set ablaze prior to sacrificing the only virgin within 100 miles. Cheap and disposable.
Cons:
Not durable
Bone:
Pros:
Is not used for stems
Horn:
Pros:
soft, workable, attractive look
Cons:
Not as durable as other materials. Pissed off that bull from whom you tried to harvest that horn moments before you died.