The BlenderBottle Classic V2 Shaker Bottle with Straw is built off the design of the iconic BlenderBottle Classic, with an upgraded look, and feature updates—including a tuck away straw, rounded base, and SpoutGuard—that make it easy to maintain proper nutrition on-the-go. The patented mixing system—with a 316 surgical-grade stainless steel BlenderBall wire whisk that moves inside the bottle to smooth out mixes—makes it ideal for protein shakes, smoothies, fiber drinks, and meal replacements. Open the bottle lid and the straw pops up through the spout, close the lid and the straws silicone spring base bends, keeping the straw tucked inside. A wide mouth makes it easy to add ingredients, and the rounded base ensures thorough mixing and easy cleanup. Bottle contents and liquids are securely contained by a tightly threaded screw-on lid that creates a leakproof seal, and an ergonomic flip cap that snaps securely shut for shaking and transportation (fits in most cupholders). A SpoutGuard makes it possible to open the flip top without touching the drinking spout, keeping the mouthpiece clean. The unique shape of the mouthpiece keeps the straw centered while drinking through the bottle spout. Embossed markings show both ounces and milliliters for easy measuring. The BlenderBottle Classic V2 Shaker Bottle can also be used as a water bottle. Available in three sizes: 20-Ounce (measurements go to 14 ounces), 28-Ounce (measurements go to 22 ounces), and 45-Ounce (measurements go to 34 ounces). BPA- and phthalate-free. Top-rack dishwasher safe. Manufacturer’s limited lifetime warranty.