Short answer
For a Posca marker case, choose a hard shell case sized for PC-5M pens if you carry a small set, a canvas slot case (60 to 120 slots) for a large collection of mixed brands, or buy a Posca set that comes with its own case. Whichever you choose, keep caps clicked on and store Posca pens flat, which keeps the paint mixed and the tips from drying.
Kinds of Posca marker case
Posca marker case types, per the listings
| Case type | Holds | Best for |
|---|---|---|
| Hard shell case | A fixed number of pens in molded foam or elastic | Carrying a small Posca set in a bag without crushing |
| Canvas slot case | 60 to 120 elastic slots, folding open | Large collections, mixed brands, seeing every color at once |
| Zippered marker case | Rows of slots plus a pouch | A tidy desk set with room for pencils and erasers |
| Set with its own case | The pens it comes with | Buying a big Posca set and storage in one go |
| Drawer or desktop box | Pens lying flat | Home storage, where nothing needs to travel |
Which Posca pens fit where
Posca pens come in very different sizes, from the slim 0.7 mm PC-1M to the chunky 15 mm PC-17K. A case that suits one size may not suit another.
- PC-1M, PC-3M, PC-5M: slim barrels that fit most elastic slot cases and pencil-style cases.
- PC-5M sets of 16 to 24: a hard shell case sized for PC-5M is the neatest carry option; the one we list says it fits 24 PC-5M pens.
- PC-7M and PC-8K: wider barrels. Check the slot diameter on the case listing before buying.
- PC-17K: too big for most slot cases; keep it in a box or a roomy pouch.
If you are still choosing sizes, see every Posca size.
How to store Posca pens
Posca’s own advice is short: it recommends storing its brush pen in a horizontal position (Posca FAQ). Flat storage makes sense for the others too. Inside each Posca is a mixing ball and a valve; lying flat keeps the paint in contact with the valve and stops pigment settling at one end. A few more habits keep pens flowing:
- Click the cap on
A loose cap is the main cause of a dry Posca tip. Push until it clicks.
- Store flat, cool and shaded
Heat thickens paint and sun fades it. A drawer or closed case is ideal.
- Group by tip, then color
Rows of PC-5M, then PC-3M, then PC-1M, sorted light to dark, so you can find a color at a glance.
- Shake before use
After storage, shake until the ball rattles, then shake a little longer.
- Prime on scrap
Press the tip on scrap paper until the color runs solid before touching your piece.
If a pen still will not flow, see paint pen not working. For case and organizer options across all brands, see acrylic marker storage.
Buying a Posca set with a case
Some Posca bundles include storage. The 62-piece gift set we list says it comes with a case, which can work out simpler than buying pens and a case separately. Compare it with the plain Posca marker sets on price per pen, and check what the case is made of in the listing photos. For what drives Posca prices, see how much Posca markers cost.
Travel tips
- Pack flat, caps on. A hard shell case protects tips from being crushed in a bag.
- Keep out of hot cars. Heat can push paint into the cap or thicken it.
- Bring scrap paper for priming, so you never prime on the piece.
- Bag the broad pens separately; a leaking PC-8K is easier to clean out of a zip bag than a case.
Posca marker cases on Amazon
Cases and a cased set, each listing checked by hand.
-
QULLITY hard shell case for Posca markers, fits 24 PC-5M
A hard shell carry case the listing says fits 24 PC-5M pens, for carrying a medium set safely.
- Hard shell
- Fits 24 PC-5M
-
BTSKY art marker carrying case, 60 slots
A zippered canvas case with 60 slots, per the listing, for a mixed set of slim Posca pens.
- 60 slots
- Canvas, zippered
-
Tombow zippered marker storage case, 54 slots
A zippered case with 54 slots and a mesh pouch, per the listing, sized for markers and brush pens.
- 54 slots
- Mesh pouch
-
TOOLI-ART marker and pen carrying case, 120 slots
A 120-slot canvas case the listing says fits most markers up to 15 mm diameter, for big collections.
- 120 slots
- Shoulder strap
-
Posca gift set of 62 acrylic paint markers with case
A large Posca bundle that comes with its own case, per the listing.
- 62 pieces
- Case included
Each pick links to an Amazon listing we checked by hand. Prices, colors and pack sizes change on Amazon, so check the listing before you buy. As an Amazon Associate we earn from qualifying purchases.
Questions people ask
How do I fill a Posca case without paying full price per pen?
The lowest price per pen usually comes from multipacks of one tip size, such as a 16 or 24 pen PC-5M set, rather than singles. Amazon, art supply chains and craft stores all sell Posca, so compare the price per pen between sellers. Prices change constantly, so we do not list them.
What is the best way to store POSCA paint pens?
Caps clicked on tight, lying flat, out of heat and direct sun. Posca specifically recommends storing its brush pen horizontally, and flat storage suits the other Posca pens too, because the paint stays mixed and the tip stays wet. Shake and prime on scrap before use if a pen has sat for a while.
Do Posca pens fit in normal marker cases?
Mostly yes. PC-1M, PC-3M and PC-5M pens are slim enough for the elastic slots in most canvas marker cases. Broad PC-7M, PC-8K and PC-17K pens are fatter and longer, so check the slot diameter the case lists, or keep broad pens in a separate pouch or box.
Sources
Last reviewed 2026-10-14. Specs and availability change; check the listing before you buy.
