A leash module including a retention opening configured to receive and retain a used pet waste bag that has been closed via a tied knot, and a bowl portion configured to receive and retain water for drinking by a pet. The leash module is configured to be removably coupled to a leash assembly. The retention opening includes a bag receipt opening sized and dimensioned to allow for insertion of the tied knot of the used pet waste bag, and a bag retention opening extending from the bag receipt opening, the bag retention opening being narrower than the bag receipt opening and being sized and dimensioned to prevent passage of the tied knot of the used pet waste bag.
