WaterMark Vertical PVC Water Bottle with Case, 2.2 Liter. For free-flushing and “in-series” deployments at any depth without exposing samples to light. Messenger-activated release mechanism has integral cable clamps allowing samplers to be easily attached to any point on line. Constructed from opaque PVC, polyethylene, and silicone, this bottle is intended for general physical, chemical, and biological water analysis (excluding trace metals and organics). Unit includes: 2.2 liter vertical water bottle, 20.0m nylon cord, line reel, 250g solid bronze messenger, and plastic carrying case.