A unique, patented, 2-piece valve prevents pressure build-up of solvents within the 8 oz wash bottle. The volatiles are vented eliminating solvent drips. Patented value allows dispensing with bottle upright or inverted. Wash bottles are labeled with four of the most commonly used solvent names. Bottles are low density polyethylene; closures and venting assembly are polypropylene. Note: Use only with solvents compatible with LDPE.