Any Angle Drinking: The weighted straw base allows toddlers to sip from any angle, making it easy to drink even when tilted Supports Sippy-to-Straw Milestone: Helps Transition from Sippy to Straw Cups Spill Proof Seal with Patented Click Lock Technology: Twist the lid until you hear a click, which signals that the seal is secure Gentle on Gums: Soft, flexible straw is gentle on gums Perfect for Travel & Home: Designed for kids on the move, fits in most cup holders and features a flip top lid that keeps drinks secure whether in the car, stroller, or high chair Easy to clean: Includes 1 straw cleaner per cup for convenient cleaning Drinkware Essentials Set Includes: Two 10 ounce straw cups with integrated flip-top lid and straw cleaning brush BPA Free: Made from durable, BPA free plastic for worry free use with children 12 months and up Makes a great gift: Look for coordinating Munchkin tableware, drinkware, flatware and more Easy Tracking: Transparent base design allows parents to easily monitor the liquid level at a glance—no guessing needed