I refuse to spend real money on my breast forms, and I have been using the ones I make myself for 6 months now with few problems. I have even had people think I got implants because of the sudden appearance of them.
I make mine out of flubber, its a weird little substance made from elmers glue, water, and borax soap additive. All told the only thing that costs more than a few dollars is the borax but it comes in a box so large you will never run out, hell I could mail some to half the trans women in the world and still have enough left over for years.
it makes something similar to silly puddy but softer and looser, it also absorbs heat and will warm to body temperature and stay that way for a while after you don't have them against the skin. Now there a semi solid so i mix it up add food coloring if I want something besides glue white (mine are bright pink right now) then I dole them out into two ziplock sandwich bags, seal them up and tape over the ziplock to be sure the stuff stays in, then I double bag them same way drop them into the feet of some nylons, tie them off, cut off the excess and I am ready to go.
they look good, move great, have real weight and behave much like human fat, they are also solid enough to help push what nature gave you up a bit to create a bit of cleavage. Personally I love mine, have gotten only positve comments about them and in fact It was due to joking with a friend about the boobs I made that I was convinced to show myself to the world which led me to full time two weeks later.
Just Google Flubber its really very easy to make.
also I call them funbags, because they are bags filled with a substance people make with children as a fun activity hence funbags. :-P
Serena