Product Overview Stun everyone with OPI Cinnamon Sweet 15ml a beautiful red nail lacquer that will add plenty of class to your style. Benefits Get in the festive mood with OPI Cinnamon Sweet, a nail varnish from the Gwen Stefani Christmas 2014 Collection. The lacquer comes complete with an OPI Pro-wide brush which makes for fast, easy, streak free application so your nails are left looking amazing.