These stickers are water resistant with a glossy laminate on top for extra protection. My stickers perform best on smooth, dry surfaces such as laptops, phones, on your notebooks, mirrors, etc. You can put them on Tumblers and other cups you hand wash, but you do so at your own risk. Not optimized for cars or outdoor use due to prolonged sun exposure. *FOR BEST RESULTS * 1. Choose a smooth surface and be sure to clean and allow it to dry thoroughly. 2. Carefully peel the sticker from its backing. 3. Press the sticker firmly in place. 4. Allow recommended 24 hours for sticker adhesive to “cure” before further handling or hand washing. Shop Sour Sweetener makes feminist, body-positive, self-love stickers. Follow my Instagram @shopsoursweetener for shop updates!