Abstract: In a yarn carrier holder for holding a yarn carrier during rotation of the yarn carrier as yarn is wound thereon, the improvement which includes serrations carried by the yarn carrier holder for cooperating with complementary serrations in the base of the yarn carrier for locking the yarn carrier against motion relative to the carrier holder.

Abstract: A frusto-conical yarn carrier of the type characterized by having a relatively small diameter end, a relatively large diameter end, an outer wall and a smooth, uninterrupted inner wall parallel to the outer wall whereby a plurality of like yarn carriers can be nested together for storage and shipment. The improvement comprises a projection such as an annular rib on one of the inner or outer wall of the cone for contacting the other of the inner or outer wall of a like yarn carrier into which the yarn carrier is nested and creating a non-parallel relationship between the adjacent walls for reducing surface contact between adjacent yarn carriers and thereby permitting easier separation from nesting relationship.