Refillable with any 50ml ink or paint

These refills come in smaller sizes too: On The Run OTR

and comes with a self-cleaning valve for consistent application

which also offers a round 2

moleskine classic pocket notebook hard cover dotted Ink and paint refills Refillable with any 50ml inkBlack pocket sized Moleskine notebook with 192 dotted pages. 70 gram acid free quality paper. Hard cover with a true sense of quality and rounded corners that allow you to comfortably carry it in your pocket or bag. Black elastic closure and an inner pocket for storing separate notes. Stylish design with a single colored cover and discreet Moleskine logo embossed on the back. Moleskine's Pocket notebooks measures 9 x 14 cm.