Whether you're heading to the gym or the office, your trusted water bottle shouldn't spill all over the place the second it's knocked over. That's why everyday shoppers and celebrities are ditching their bulky cups and replacing them with Kylie Jenner's leak-proof tumbler - it keeps drinks cold for over 12 hours! Kylie Jenner was spotted leaving a Pilates class with the HydroJug Traveler Water Bottle, which is loved by nurses and teachers for its non-slip rubber base, circular flip straw and sturdy grip handle.