if you put a cup full to the top of saturated naptha into the freezer would it produce dmt or does the naptha have to be placed seperatly into many jars with about 40ml in each as the noman tek suggests?

I don't know if a cup would be the wisest thing to do a freeze precip in just because if it has a narrow mouth, it may be difficult to scrape up. I've also found additional surface area from tupperware to be helpful in getting everything to freeze precip evenly and quickly. Perhaps the tek calls for multiple jars because of this surface area issue? I only use one piece of tupperware and it works fine.

does the freeze precip container have to glass?

I use nomans' tek, I have never put a completely full jar in the freezer, but I often put about 350-400ml in one jar (1 pint jar) to go into the freezer. That always works well for me. I always use the same amount of materials every time because it always works great.

60oz di water
100g pre powdered mhrb
100g lye
100ml vm+p pulls

I usually put my first 4-5 pulls in one jar and freeze precip.
I let the mhrb/lye/water sit for a few days then do a couple more pulls.

I always use glass

I use a plastic PET bottle with a couple of small screws in it.
Just shake it vigorously to get the crystals floating and pour it through a coffee filter. There will be a small amount of crystals left in the bottle but just use that for the next freezing