Noodler's ink is 100% made in the U.S.A., from cap to glass to ink. Their waterproof/fraud proof line cannot be altered on a cheque by rain or bleach or ammonia. Noodler's ink is bottled by weight: 1 ounce or 3 ounces of ink per bottle. (An ink bottle contains 3 ounces of ink, unless otherwise noted.) The Baystate series of inks was created to replicate vintage inks; please be aware that this series may stain. All Noodler's inks provide archival quality.