Your Perfect Gym Buddy – Bobble sport is our most stylish water bottle that is ideal for your gym workouts and outdoor sports. Bobble Sport has a molded-in grip design that will easily fit your bike cages, car and treadmill cup holders. Sports Water Bobble is made up of recycled plastic and is free of BPA and PVC. It comes in cool grey color with easy carry cap - perfect for both men and women. Bobble Grey Sport also comes with a replaceable carbon filter which requires very little maintenance and is perhaps the most powerful chemical absorbents known to man. We recommend changing your Bobble Sports Carbon Filter after every 3 months or 150litres of water.