these are the final moulds of the clay version before i wait for it to set and order some silicone to make a resin version so it is less heavy and fragile!
MORE ADVICE ANSWERED IN RHYME...
If I were to do your vigor myself,
I would rotocast transparent bought right off the shelf.
So pay attention mixing parts A and B. Too much hardener will result in much tra-ge-dy.
too much hardener it will warp from the rapid heat and shrinking.
So before you have the bottle to hold, be sure you commit to thinking.
Im doing mine clear red as a simple bottle topper
With a demon head, secured with a stopper.
Can I get a rep rep! :-D
*specifically castin crafts clear with green dye tint form any hobby store,
after that you can paint the inside of the bottle by swishing around paint thats watered down.
Depending on the lighting youre going for,
you can wash with dark or light,
just dont drop it on the floor.
Of course I would suggest buying higher quality supplies from smooth on but if budget or availability is an issue, castin crafts clear works just fine BUT it is the most sensitive resin Ive ever worked with. Temperature and moisture can make or break a cast.