Review (1/5): NOT AIRTIGHT!
These are cute, lightweight containers. I put water in them and shook it around. The jars passed the test! I wish I had placed the jar on its side. When laid on its side it DOES LEAK. I sell EO products on Etsy and my customer got this horrible mess. I tested the containers again (laying them on their side hoping my customer just got a bad one) and they leaked. The seller did refund my money but did not change (at this time) their claims of airtightness.
These are cute if you don't need some leakproof.