Based on the rather popular 43/48mm oval B-ring of the v5 male chastity system (https://www.thingiverse.com/thing:3061308), this is a full chastity enlosure.
Use
...Show more locking pin https://www.thingiverse.com/download:5255234 of v3 device (https://www.thingiverse.com/thing:3057251) or Burg Wachter ME lock (or cheap China clone) to connect base ring and cage.
freeCAD files included!
Have fun!
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**Update 2018/09/07**
Ultimate C-Tube with lid and cleansing system - Use a syringe to inject water (or something else thas suits your needs) into tube and shell
**Update 2018/09/04**
Added another "box" design with fitting C-Tube but without lid
**Update 2018/09/02**
Added a lid with tube
Added a smaller version of the box
All lids updated with a small bevel to lock behind the base box
