The same trusted bottle with added benefitsthe new dr browns options8482 the first convertible bottle that can be used with or without the green vent systemthe unique internal green vent system continues to create 10037 vacuum free feeding which is clinically proven to help reduce wind related colic this is what makes 9 out of 10 healthcare professionals recommend dr browns for the relief of wind related colicas baby becomes more developed the bottle can be used without the gree