Our best selling bottle is now even better the new and improved ergonomic design provides better feel and function while still retaining the durable 100 leak free qualities its known for new big mouth cap design features a wide water channel to deliver up to 50 greater flow than other leading bottles plus improved functional outside grip large soft and reliable poppet top is easy to activate and seals tight 100 leak free easy to grip and more flexible than the original big mouth bottl