I recently purchased some Klasse AIO and noticed the bottle had what I assumed was an expiration date of 5-30-12. I called up the place I ordered it from and they told me it was just a batch number and that Klasse doesn't really expire. Anyone know if that's actually the case? I've had a few bottles of Klasse in the past and the numbers I've seen printed on the bottles all seemed to look like some kind of date so I just assumed it was an expiration.