I believe they are the best for long-term storage for valuable casino chips. I store my $2.50 collection in them and keep them in an old oak 36 drawer lawyer's file cabinet. Makes travel difficult - but they do not travel anyway. The 20 square foot display case that I built for the convention exhibit in 1996 is now too small. Anyone want to buy a big flat display case?
Anyway, back to Airtites. They are made by: Air-Tite Holders, Inc. , P.O. Box 83, Dalton, MA 01227-0083. They are called I Holders (eye) and 39 mm black ring inserts fit chips perfectly. As a dealer and repeat customer, I buy them 250 at a time for $104.75 (shipping included). I recommend them highly but as I have stated, travel and/or display is challenging. Merry Christmas.
Bob Feeney