@Pietro
I have a 1L and a 2L Erlenmeyer Flask(s), and have used the 2L for a Munich Helles and a Kolsch in the past. It worked, surprisingly, but I would like to err on the side of caution going forward.
I saw the 4L flask is running around $75, and I really do not want to spend the money on that when I could use the same $75 to make approximately three batches of homebrew. :cheers:
The good news is I do two lagers and one Kolsch per year and never do high gravity ales. So, in this example, would it be fundamentally incorrect to pitch 2 lager/kolsch yeast vials/packs into a 1.5 L starter (made with 150 grams if DME)? I am assuming that would make a 3 L starter. Granted more cost in the long run, but using my brew schedule it would take 5 years to become cost effective to buy the 4L flask.
I like Denny’s idea of the apple juice bottle, but worry about putting that on the stir plate for 12 hrs while I am at work.