You only need one hand to flip this top!  Fashionable and functional, the innovative Active Bottle Top provides higher performance than most standard sports caps. A dirt-proof lid flips easily off of the top of the cap and a gentle pull unlocks the mouthpiece mechanism. Made from safe, non-leaching polypropylene, our Active Bottle Top is designed to fit our newer wide mouth 10 oz., 16 oz., and 33 oz. stainless steel EcoUsable™ water bottles.  This sports cap is not compatible with the Eco2o filtered water bottles.  Not sure if your EcoUsable is the newer wide mouth?  Call us and we can help you figure it out.  The bottles opening have a dimension of 1 9/16” inches.  The cap is also dishwasher safe.