TESTED FOR SAFETY BY A 3RD-PARTY: We don't mess around when it comes to our children so all insulated sippy cups for toddlers are rigorously tested by certified US laboratories INNOVATIVE, VERSATILE LID: Cupkin’s uniquely engineered, multifunctional lids are complete game changers! Designed for both hot and cold use, flip open the built-in tab to safely sip your morning coffee or snap it closed and insert the matching straw (included) to enjoy your favorite iced beverages and smoothies! Our proprietary lids also feature a notch to lock it in the open position, a spill-proof rubber gasket, snug-fit straw hole to keep things in place, and a vent hole complete with plug SAFETY FIRST: Rigorously tested for safety by third-party, fully-certified US laboratories, all Cupkin tumblers and accessories are crafted from only high quality, food-grade materials. They are also non-toxic and 100% BPA, chemical, and phthalate free EASY TO CLEAN: All Cupkin cups and accessories are quick and easy to clean! Simply lather with soapy water and rinse. Lids and Straws are also top-rack dishwasher safe! WHAT’S INCLUDED: Each Cupkin tumbler comes complete with 1-20oz stainless steel cup, 1-multifunction convertible hot/cold lid, and 1-matching food-grade silicone straw for a perfect fit and leak-proof experience every time. Cupkin is a US-based children’s product brand started by a husband and wife team based out of Bothell, Washington, USA. We originally partnered with the founder of the HydroFlask brand who helped us create the best quality drinking cups with lids and straws for your kiddos. Having two girls of our own, product quality is our TOP PRIORITY. Any Cupkin cup you purchase has been tested and contains NO phthalates, NO BPA’s and NO chemical toxins. So whether you use your Cupkin at home, outdoor or at a restaurant, each cup is the perfect replacement for disposable waste. This listing includes a set of 2 stainless steel cups, 2 lids and 2 silicone straws. All of the other children’s cups on the market are made with a cheap painted enamel shell, which chips, cracks and fades easily. Our cups are produced with high heat tolerant powder coating. They’re more resistant to scratching, denting, chipping and fading. Dishwashing is not recommended for the stainless steel cups so make sure to verify your dishwasher’s power output otherwise it could potentially damage the cups. Lids and straws however are 100% dishwasher friendly. So whether you’re just browsing or considering purchasing a set of our kids cups, on behalf of my wife and our 2 little girls... I wanted to welcome you to our family. We’re confident that your little girls and boys will enjoy their water, milk, juice or smoothies in their fancy, new Cupkin(s). Stay safe parents, you got THIS!!! - Max, SooJin & (E + P)