The plastic surrounding the opening of a bottle shaped to accommodate a specific closure. It’s the portion of the neck that carries the threads, lugs or friction fit members to which the closure is applied, and includes the sealing surface and sealing bead; generally, the whole portion above the transfer or pry-off bead. Pretium makes continuous thread (C/T) necks for twist-on caps, and Hinge-Guard (J-Cap) necks for snap-on caps.