This is the largest bottle on the market of its kind. Why 2.75 liters? We are big fitness and health advocates and believe in building the proper foundation. A big part of staying healthy is to stay hydrated! Fill up our bottle with water and we challenge you to drink a bottle a day! There are just so many benefits of drinking enough water daily and our bottle makes that task easy. Built out of BPA free Eastman Tritan, we can ensure the quality of the materials being used in our bottle. Our bottles would be perfect for any fitness enthusiasts, professionals, athletes, coaches, body builders with their needs and to promote drinking MORE water. Think green: fill up our bottle once/day and stop buying cheap disposable plastic water bottles. Our large bottle also has a silicone-lined 3.5 inch wide opening for easy access, mixing and cleaning. The top of the bottle has built in handles and a one inch screw down cap for a secure access. Our offering is features packed and even comes with its own fitted neoprene sleeve with adjustable straps for easy carrying. Be sure to give our product a try and spread the word!