Precision PourŪ spouts feature numerous patented innovations, among them are:

• A new valve alongside the main
  cylinder to prevent after-drip and
  eliminate waste.
• A primer ring to channel liquor
  around the inner ball bearing for a
  more accurate pour.
• Three ball bearings, rather than
  the old standard two, for a smoother,
  more accurate pour.
• A new bottom design that ensures
  that the ball bearings will never fall into
  the bottle.

Materials
Some old-style spouts are made from recycled plastic. Precision PourŪ spouts are made using virgin
plastic, a far more durable material.  Some old-style spouts also employ polycarbonate plastic which will break down in alcohol. We use no poly-carbonates. As a result, a Precision Pour will outlast other styles of spouts.