I've compiled my thoughts on a lot of the very basic questions about bottled fountain pen ink, enjoy! How long does ink last (in usage or storage)? (:36), How much does a bottle of ink cost? (1:42), How do cartridges compare to bottles (for economy)? (2:04), How do you store ink? (2:47), Can you reuse ink (dump it back in the bottle)? (3:25), Can you mix inks? (4:02)