Upgrade your favorite 30 oz tumbler with these innovative replacement lids featuring a smooth magnetic slider mechanism. These crystal-clear lids are precisely engineered to fit multiple tumbler types, including 30 oz tumblers, 14 oz mugs, and various other popular brands like Hydro Flask 32 oz, Simple Modern, and more. The lid's dimensions are 3.74 inches in diameter and 0.9 inches in height, ensuring a secure fit. The standout feature is the magnetic slider closure that operates smoothly and reliably, making it easy to open and close with one hand. Each pack includes two premium lids, perfect for backup or sharing. The transparent design lets you see your beverage level while maintaining temperature control. These lids are ideal for both hot and cold drinks, with a robust construction that prevents spills and leaks during daily use.