did you use a campden tablet in your must? did you pitch the yeast yet? would be ashame to abort a fermentation prematurely. where did you get the 4 liter container? was it used for anything else? i think you'll be ok while still in the fermentation process but i'm no expert either. you'll still get wine either way, just might not taste like it should. and if you're not familiar with how homemade wine tastes you may never even know. I use a big rubbemaid container marked "cleaner". I collect all my tools, tubing, utensils, etc. and gather them all up in it. then i add cleanser. it's much easier than setting stuff on the counter cause then you forget to grab something. i do the same with my sanitizing after cleaning.