Integrated spout is easier to clean than traditional two piece neck/spouts and no spout to lose, break or get clogged Color coded for easy identification and quick selection at busy times. Oval neck with textured step design provides better ergonomics. Easy pour bottles with clog resistant spouts for mixers and juices. Thicker thread, improved design with greater overlap for superior hold and leak protection. Assorted packs include 2 of each color. Necks are cross compatible our necks are interchangeable with most competitors jars.