The original Lansinoh caps can be used in combination with all Lansinoh wide-neck bottles (NaturalWave) and are suitable for secure closure. Thanks to the sealing plates, leak-proof transport and freezing is possible. Package includes 4 x purple caps. Cleaning instructions: Lansinoh replacement parts are carefully tested and can be safely cleaned in boiling water, (steam) vaporiser, and microwave sterilisation bags.