Etymology
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Blend of key + container, originally a trademark.
keytainer (plural keytainers)
- A small portable case for a person's keys.
2005, Tony Hillerman, Rosemary Herbert, Sue Grafton, A New Omnibus of Crime, page 76:And in my mind I was looking at something else, a set of brand-new car keys in a keytainer stamped: “The Packard House,” upstairs, in a dead man's pocket.