It is a portable tank.  It will be self-contained and primarily used with hickory and threadfin shad in my V and in dad's little boat.
 
BC here is what you need:
 
1/2" styrofoam sheets - enough to wrap around 2 x
3/4" styrofoam sheets - enough to wrap around 1 x
 
Clean the exterior of the tub and dry thoroughly then ruff up with coarse sandpaper and you are ready to start.
 
Use 3M Sta-Put spray adhesive (follow instructions on can) to stick the foam on the tub leaving an overhang which you can cut off with a sharp knife later.
 
We used the sta'put in the blue can.
 
 
Once you stick the foam and trim edges - we beveled the edges - you can use sandpaper on the foam to smooth out the bevels.  
 
On the fiberglass mesh, we used stucco mesh as seen in the pics.  Below is a pic of some I found online.  Basically he put a bed coat of the rubberized coating directly on the foam and pressed the mesh into it, then went back over the whole deal 4 more times or so w/ rubberized coating, smoothing each time.  He let the mesh overhang on the top and bottom then put slits every inch or so in order to wrap the bevels.
 
Then paint and lid.  The yellow seal on the lid is an old garden hose w/ caulking.   
 
