This toilet, located just inside the entrance to the Domain is at the road end of the building that is to your left. It is unisex with just one wheelchair accessible cubicle and no urinal.
The outside door is actually a lockable grill. No hours are posted but there is the chance that it is locked at night. If caught short there are toilets available 24/7 at Ocean View (S45 56.258 E170 21.373) which are a couple or so kilometres away. Once you have stepped inside to the handbasin area you will notice that the floor is unpainted concrete and the walls are concrete blocks painted a pale creamy colour. The hand basin is located on the wall to your left with a soap dispenser above. Hand drying is the "shake your hands" variety. The door to the cubicle looks as though it is made of painted particle board; same colour as the walls. There is an indicator by the latch to tell you if it has been latched from the inside or not.
The cubicle has one white cermanic toilet bowl with the ubiquitous white plastic seat and lid. On the wall above is the white plastic cistern with two flush options. When seated, to your left is a stainless steel toilet roll holder that can hold one large roll of toilet paper. No toilet roll in reserve which could be problematic at times. (The cleaning schedule in the entrance way gave no indication of cleaning frequency). This toilet roll is in the elbow of the stainless steel hand rail that is there for those who need assistance. Also, when on the throne you will see to your right a plastic basket enclosed in a plastic bag for disposal of any sanitary products that are not designed to be flushed, as well as any other rubbish you may want to dispose of. That definitely excludes any cigarrette butts and similar products - you don't want to cause a fire.
The door is latch is a simple one, turn the knob and a light weight bolt should shoot home. Look up and you will see light coming inthrought some clear corrugated sheets.
Overall, at the time of my visit there were two other users, one who Ihad to for upon my arrival and one who went in while I returned to the car for my camera so it seems as though this loo gets quite a bit of use. On the whole they were clean, non odourous and they served their purpose.
Now, your really there for the cache which is a short distance away. Go for 203.1m at a bearing of 92.62 degrees. You will find a 200ml snap top container at the base of a small flax bush. You will need to step over the fence. I did say step, not climb. Please ensure that it is returned so it isn't visible from the other side of the fence. Take great care here with children as there is a drop off to the beach below. Ongoing erosion could make the safe space around the cache smaller over time.
If you have children then you can visit the nearby playground equipment.
if you really want this cache and have no private transport, visit the Otago Regional Council for an up to date timetable. Coming from the city or Mosgiel will require a change of buses along the way. Time waiting for buses can be killed looking for other caches in the area.