I love the addition of the new herbalism and alchemy pouches and flasks, it's a great addition for organisation.
I have yet to check other places for alchemical flasks, but I've noticed that Codrin Varzaru in the Mage Tower does not sell them when you view his alchemical equipment. Is this an oversight?
Thanks,
~ emptyanima
EDIT: To clarify, he sells the alembic, kit, resin and containers. It's the reagent sorting flasks he does not stock.