The cache is a 200ml Sistema container hidden half way up the Puriri Track.
Tracks.org.nz says:
Starting from no-man's-land just up hill from Puriri Street, this track provides access to the main track along the ridge between Wainuiomata and Eastbourne, that is, the Mount Lowry (Main Ridge) track.
For more information, please see the listing on Tracks.org.nz.
You could also continue up the track to grab a few more caches while in the area.
The cache contains only a logbook. You will need to bring your own pen.
Please take the time to hide the cache as you found it in exactly the same location.
Online logs not corresponding with the physical log book will be deleted.