Digital BW, The Print

Looks like from the FAQ at MIS it can be done either way...
http://www.inksupply.com/index.cfm?source=html/cobrafaq.html

"How do I fill the reservoir bottles ?

When the CFS reservoir bottles reach the refill point, simply remove 
the top from the bottle and pour in more ink. Alternatively, keep a 
spare 4 oz set of inks handy and when you get low, just unscrew the 
cap and slide a new bottle in place of the empty one."


Cleavis