Also voting for Cyb's MAX ION or Salt Tek.
I like to use this 1L Simax reagent bottle since it has narrowing neck, great for pulling NPS by pipette:
It works for 150 g MHRB powder if you fiddle with water amounts so it fills up to the narrowing part.
I will try scaled up extraction (250-300 g) with the same kind of bottle, only 2L.