Keep your straw clean and protected with the Flip N Sip Silicone Straw Cap, designed for 40 oz tumblers. Made from durable, food-grade silicone, it fits standard 8-10mm straws with a snug seal to block dust, dirt, and spills. Lightweight and reusable, this eco-friendly topper is perfect for daily commutes, travel, or outdoor adventures. Features a flat logo area for bold, lasting customization.