Sip smarter. Designed to help you stay hydrated all day long, the Thrive Flip Straw 32oz is the largest in our Thrive Flip series of bottles, and built to be your constant companion no matter where your day takes you. Built with an on-the-go flow valve, hassle-free dust cover, and soft pivoting handle make it easier than ever to bring along on a day hike or toss in your cupholder before you hit the road.