Nalgene™ Mason Jar Replacement Closures

Ensure leakproof† performance with Thermo Scientific™ Nalgene™ colored closures — one piece and linerless with integrally molded seal ring. The opaque closures protect contents from UV light when used with opaque bottles.

Combine the elastomeric sealing of silicone with nonreactive polytetrafluoroethylene reagent contact surfaces in Thermo Scientific™ Nalgene™ Septum Closures, for use with Nalgene™ Sterile PET & PETG media bottles.

Eliminate spills with Thermo Scientific™ Nalgene™ Colored Polypropylene Closures. These one-piece, linerless closures fit Nalgene™ narrow-mouth 4mL bottles. They feature an integrally molded seal ring and a well-defined closure knurl that makes gripping and capping easy.

Ensure the integrity of bottle contents with Thermo Scientific™ Heat-Shrink Bands for Thermo Scientific™ Nalgene™ PETG Media Bottles. Simply apply the recommended application torque for Thermo Scientific Nalgene closures and slide the heat-shrink band over the closure and bottle neck. Heat the band to shrink and secure contents with a tamper-resistant seal.