Zak Designs Monsters University Optix Flip N Sip Tumbler, 12-Ounce 12-ounce kid's tumbler features 3D Monsters University artwork Lid easy screws on and off; slide-back top reveals flexible pop-up straw Bendy, flexible straw makes sipping drinks more fun BPA free; for children ages 3 and up Stain resistant and dishwasher safe; do not microwave