A Freund Exclusive! Our 33 oz. Kautex White (HDPE) Wide Mouth Leakproof Bottles are UN Approved, have a wide mouth, a space-saving design, a recessed label panel, are impact resistant and easy to fill and clean. These bottles are definitely a secure packaging solution because they come complete with a blue tamper-evident (PP) cap. Note: Bottles should be closed with a wrench to ensure the required torque is applied for proper performance. Wrench sold separately.