LEAK PROOF GUARANTEE - If it leaks please contact us and we'll make sure you're issues are resolved. We pride ourselves in our quality products and customer service. Also, the patented design of Helimix includes a sturdy loop for easy transport to and from the gym. The Helimix is just the right size that fits in nearly all cup holders. DURABLE & EASY TO CLEAN - Helimix uses shatter-proof Tritan plastic. And once your workout is done, throw the Helimix in your dishwasher for a quick and easy clean. Most other shaker bottles are made of cheap plastic and are breakable. ODOR RESISTANT MATERIAL - Helimix is made with Tritan Plastic, which makes the cup odor resistant so you don't have to gag down your sports drinks. It's also 100% BPA/BPS-free plastic to ensure supplements stay clean. SUPERIOR SUPPLEMENT MIXING - Helimix has been rigorously tested against other mixer cups to ensure you get the best shaker bottle on the market. Our patented vortex design allows for optimal mixing of any powder supplement. NO SHAKING ACCESSORIES NEEDED - Forget the days of looking for your wire shaker ball and buying shaker ball replacements because the Helimix uses a patented vortex blender design that doesn't require anything but a few good shakes. This also means you don't have to worry about a clogged or dirty shaker balls ruining your protein shake.