a novel bottle being ergonomically designed for active consumers is disclosed herein . in a preferred embodiment , the bottle has a design ideally shaped to mate to a user &# 39 ; s hand that is ideally suited to walkers or even runners , for example . the embodiment further comprises an outer container having a vent hole , and an inner liner further coupled to a one - way valve ; and together , this combination of structure reduces sloshing as is common in a partially filled bottle . additionally , the inner liner is disposable and biodegradeable , and therefore the bottle outer container does not have to be washed or through away , that may otherwise pollute our environment , and increase consumption of raw materials . ideally , the sports bottle herein comprises low - density polyethylene for comfort and easy squeezing of the outer container . also , a novel method for lining a sports bottle is disclosed herein .