YES, these jars have lined closures making them air and moisture tight. You may also want to consider our
CHILDPROOF STRAIGHT SIDED JARS ITEM CODE # 1515
These jars are also air and moisture tight.
The closures have been certified as "child resistant". The term "child proof" is incorrect and has been corrected on the site. Thank you for bringing this to our attention. Here is a link to the certification documentation:
https://www.ebottles.com/addphotos/MRPCRclosures-4.pdf
