As another user notes, they are too thin and too short to fit and work in the FIGROL Mini Office Donut Portable Humidifierhttps://www .amazon.com/ FIGROL -Portable-Humidifier-Household-Without/dp/B07NSPG2SZ/ref=sr_1_1_sspa?dchild=1&keywords=donut+humidifier&qid=1590769943&sr=8-1-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUEyWUMyNlNKRFdLSDgwJmVuY3J5cHRlZElkPUEwMTY1MTA2MzA4RTNLWTNEVlBCQiZlbmNyeXB0ZWRBZElkPUEwNjIwMTMxMk1PQUo1VkZWUUVBWiZ3aWRnZXROYW1lPXNwX2F0ZiZhY3Rpb249Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU=Why Revain lists it with the humidifier is odd.
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