Pen Meter - pH Cond TDS Salt TempThis 500ml wash bottle is built from durable LDPE and features an easy squeeze body with a narrow dispensing nozzle. It provides precision when applying liquids and is ideal for daily use in science classrooms and laboratories. Educational Benefits Enhances precision in liquid application. Supports student learning of lab handling procedures. Encourages independence with familiar, safe tools. Reduces spillage and waste through narrow nozzle design.