A drainage system for a vehicle is disclosed herein. A drain is disposed within a vehicle substrate and has a floor. A receiver is disposed proximate to the floor. A cap feature is operably coupled to the drain and is operable between first and second positions relative to the drain. The cap feature includes an upper platform and a sidewall that extends generally downward from the upper platform. A cutout is defined by the cap feature and is configured to allow liquid to flow through the cap feature. An engagement feature is coupled to the cap feature and is operable between a disengaged position and an engaged position in which the engagement feature is engaged with the receiver. Movement of the cap feature from the first position to the second position moves the engagement feature from the disengaged position to the engaged position.