Thetford 335 Boat Porta Potti The Thetford 335 Porta Potti features a refreshed, modern appearance that looks great on any vessel! The 335 delivers industry-leading performance youve come to expect from Thetfords line of portable toilets. All Thetford portable toilets are sanitary, odorless, and leak proof. The 335 Porta Potti is an excellent choice for marine, recreational vehicles, outdoor activities, trucking, and toddler training. Features Exclusive rotating pour-out spout Ergonomic carrying