Nalgene 2436 Vented Unitary LDPE Right-To-Know Wash Bottles help keep hazardous volatile liquids off the lab bench. These wash bottles feature a unique vent system. Unitary bottle prevents contamination when filling the bottle; no draw tube assembly to pick up contamination off the lab bench. A strong, steady stream of liquid is dispensed when the wash bottle is squeezed. Marked with four color, NFPA diamonds, GHS compliant hazard symbols, and right-to-know chemical information. Choose from seven chemical markings. Leakproof.