Ideal for storInchg or freezInchg with regular mouth glass preservInchg jars. The versatile regular mouth plastic storage caps provide more ways to store your creations. You may refrigerate, freeze or store. Makes mason jars Inchto practical storage contaInchers. Each package contaInchs 6 reusable plastic storage caps. Dishwasher safe. Does not contaInch bisphenol a (bpa). Not for use with the fresh preservInchg process.