The petling is a very robust cache container which is perfect for any weather.
The Pet-tube 40ml is 13cm and an internal diameter of about 18mm, the ring around 3cm.
Totally waterproof and very practical for micro caches or tree cavities.
Highlight: the cap is a standard drinks cap that when closed for the first time is locked until the the first time opening.
I comes ready to place with cache sticker, a logbook and a pencil.