I found myself looking at my french press this morning and thinking 'You know, self, that carafe is about a liter in size, flat bottomed, and made of borosilicate glass. It could be very useful with a stir plate for starters."
So I checked on the price at Amazon, and a replacement carafe is about $20. That compares pretty favorably with liter-sized Erlenmeyer flasks.
I'm not sure that actually pressing the starter would do much, since yeast are WAY smaller than the screen on my press, but it would sure go well with a stir plate.