Hey y'all! Greetings from ATX! It's brew day and all football's eve for those who celebrate (GO COWBOYS!!!). Made a 3L starter with Wyeast 3711. Hope all goes well! Will update soonish. :)
I don't know if this is "THE" reason to use an erlenmeyer, but it helps to wash trub for reusing yeast. Pour off the yeast layer easily leaving the trub cake on the bottom. I figure it's probably also helpful to keep your starter in the container if you're running a stir plate.