100% LEAKPROOF: The innovative retracting straw technology ensures you can toss your tumbler in your bag worry-free. MADE TO MOVE: With a comfortable swinging handle for easy carrying and a cupholder compatible base, this tumbler keeps hydration effortlessly within reach all day long. HIDE A STRAW TECHNOLOGY: With a quick turn of the lid dial, the soft silicone straw tucks neatly away, making the lid leak-proof and keeping the drinking surface clean when not in use.