for All Lid Materials: Works with all types of tumbler lids — plastic, stainless steel, aluminum, glass, or silicone. The straw cap magnetically attaches to metal lids and sticks to any material with the included magnetic patch. Enjoy a perfect fit for nearly every cup or bottle you own Keeps drinks clean: Crafted from premium, BPA-free food-grade silicone that’s safe for all beverages. Keeps your drinks clean. Soft, durable, and easy to clean—perfect for daily hydration and long-term use Magnetic Design Prevents Loss: Built-in magnet securely holds the cap on your brumate era 40 oz 30oz lid when not in use. No more dropping or losing your straw cap—just snap it on and go! Quick and easy access saves time and hassle during workouts, travel, or daily routines Fits Popular Straw Tumblers & Bottles: Compatible with top brands like for Hydro Flask,for Stanley,for Simple Modern,for BrüMate,for Owala, for YETI,for Contigo, for CamelBak. Designed to fit 6–12mm diameter straws snugly and securely. One cap for all your favorite drinkware—no need to switch! Stylish & Gift-Worthy: Bright colors meet sleek design for a trendy, practical accessory. Matches your tumbler for a coordinated look. Great for all ages—makes a thoughtful gift for family, friends, coworkers, and classmates who value both style and cleanliness Mity rain 4 Pack Straw Covers Magnetic for BrüMate Era & Resa Tumblers - Fits 6–12mm Straws, Magnetic Lid Toppers Caps Compatible with Brumate era 40 oz 30oz cup and Most Bottle