Is it deffinately the bottle?
Have you seen the hole?
This happened to mine, fluid just pouring onto floor, removed wheel and wheelarch liner, and found the bottom tube to the pump had fallen off, just reconected and tested it, been good for nearly a year now.
Well worth a look see.
If it turns out to be the bottle itself, then maybe some fibreglass matting, or a hot knife would work in the short term?