United Scientific polypropylene reagent bottles are engineered for reliable sample storage and transfer across laboratory, research, and classroom environments. This pack of 12 wide mouth 4 oz bottles with lids delivers the leak-proof performance and solvent resistance that lab professionals depend on for daily reagent handling. Leak-Proof Seal: Integrated seal rings on each screw cap create a secure closure that prevents spills during transport and storage, making these small liquid containers dependable for field sampling and bench use alike. Broad Temperature Range: Autoclavable at 121°C (cap included) and rated from -40°C to 121°C, these 4oz plastic bottles with lids withstand sterilization cycles and cold storage without warping or seal failure. Chemical Resistance: Constructed from laboratory-grade polypropylene, these sample bottles resist a wide range of reagents, solvents, and corrosive materials. Suitable for use as oil sample bottles, water sample bottles, and general reagent storage. Wide Mouth Design: The wide mouth opening simplifies filling, pouring, and cleaning of powders, viscous liquids, and particulate samples, reducing transfer loss and improving workflow efficiency. Safety Compliance: Heavy metal-free, BPA-free, phthalate-free, and RoHS compliant - precision-molded for uniform wall thickness and consistent performance across the full pack of 12. Unlike standard plastic liquid containers, these polypropylene containers with lids are purpose-built for laboratory-grade demands, combining impact resistance, autoclavability, and broad solvent compatibility in a single compact format. Ideal for university researchers, lab technicians, and science educators who need dependable 4 oz plastic bottles with lids for sample collection, reagent preparation, or field sampling. These bottles perform equally well in analytical labs, field kits, and classroom storage applications.