If you started at Meadow View Lane, then you have traveled about 2.5km so far. I hope you haven't encountered any "Are we there yet?", "You said that last one was the last cache for today". "what treat will I get if I walk another meter", "you said we would enjoy this", "why didn't you make me wear my other shoes", "I'm tired, hungry, need a toilet".... If you haven't heard such comments yet, consider yourself lucky, and continue along the path for two more caches if you haven't ready done them.
If you parked near the old Horotui Bridge, then these phrases may still be heard, but a bit later on!
You are looking for a camo medicine bottle. See background image for clue to it's location. If all else fails, see the hint.