A bath tub 100 for neonatal bathing including a backrest 112 that provides support for the baby at an inclined position, and a seat 152 to cooperate with the backrest 112 to flex the baby's hips to suppress the baby's urge to sit up or squirm. Embodiments may include side supports 136, 138 and/or stabilizer ribs 166, 168 to resist baby rotation about the seat 152. The tub 100 may be structured to reduce leverage to the baby to resist baby's turning over during a bath. A drain path 180 is desirably provided to maintain thermal equilibrium in the water during a bath. A system 240 may include a plurality of bathing accessories and a disposable sterile liner 264 to permit reuse of the tub 100, and/or an optional storage bag 268 to store the tub 100, and even a system 240, at a convenient location.