It features a unique straw that peels open for easy, thorough cleaning and tucks neatly into the lid for germ-free, on the go use. The one-way valve prevents leaks and spills, too (just be sure to activate it first!). Not only is this transitional cup clean when it comes to spillage, it's also clean in its sleek, single-color design. Perfect for tossing into a lunchbox or diaper bag, the Simple Clean Straw Cup is a practical, stylish, kid-friendly upgrade to regular sippy cups. Cheers to streamlining toddler drinkware!