This is the response we got from Bianca @ Miron ([email protected])

Hello John and Aleks,

Thank you for getting in touch! As Milena mentioned, the experiment was conducted using the 5ml Ceres jar. This is our most popular jar for our clients in the cannabis industry. Miron has been the go-to for anything that is photosensitive and needs to be preserved to its maximum potential. Another preserving factor is our caps. Each cap contains a violet-colored sealing element that hermetically seals the jars (check out the inside of the https://www.miron.com/usa/lid-modern-29-special-urea-black-semi-glossy-violet-phan-inlay-ceres-5/EGA01A1A016-200&source=gmail&ust=1729651155633000&usg=AOvVaw2Uloel_jss5wqD3d1pXKV -">lid here). This violet foam is made from PHAN, a three-layer laminated product with two layers of solid PET films on the outside and a layer of foamed EPE on the inside. The foamed core provides the resilience needed for airtight sealing- in short, yes! All lids provide an airtight seal.

I have attached a data sheet for more details on Phan.

Here is a list with links and wholesale pricing for our 5ml Ceres jar and lid, along with all the other jars (including the child-resistant series, Eris) used by our clients in the cannabis industry.

This is the data sheet for their PHAN technology