Typical male urethral and bladder irrigation syringes are provided with a conical tip, that it may be connected to a soft rubber catheter.  The plungers were provided with a button or ring at the proximal end, the latter along with a flange-type finger hold at the proximal end of the syringe barrel was particularly suited to one-handed self administration. Truax-1287
A fine and early example fashioned from bone.