T3 StylePlus 1″ Flat Iron – Costco Sale! by Rhonda January 24, 2023 8/6/22. © Frugal Hotspot *UPDATE* 1/24/23. Smooth and straighten or create some waves with the T3 SinglePass StylePlus 1″ Flat Iron from Costco. No more guessing how hot you need to … 0 FacebookTwitterPinterestEmail