[golly]

While plain ol'e ziplock bags can't be PC'd without rupturing ,they can be steamed..
So ,in this experiment i used the fractional sterilization Tek [ two steams 24hrs apart ] on 1 gallon ziplocks, filled with one pound of BRF/Horse poo..

After sterilization the bags are still supple/flexible and not brittle or weaken'd
at all...

First pic shows the "Hefty one zip" bag used ..25 bags for 4 Bucks...

second pic - the Polyfill needed for a filter and a wire tie to hold in place..

Third pic - the assembled bag, ready for steaming...The filter and zip was trimmed to ensure that the innoculating needle will penetrate through the
filter base after sterilizing...