1 Bigso Cardboard Box (magnetic closure)5 Stabilo Markers (choose colors)1 Small cellulose sponge
Stabilo 3-in-1 = Markers + Dry Erase + Watercolors all in one.
Smoother and chunkier than a color pencil.
Turns into watercolor when brushed with a wet paintbrush (or fingers).
Use for marking on dry-erase boards or windows - wipes off easily with a damp cloth or sponge.
They don't dry out because there are no caps to leave off, and they last for ages.
It's plastic, but it's the only one large enough to sharpen this particular marker the right way (so the tip does not break off).
Stabilo markers that are primarily used for writing on dry-erase boards or glass rarely need to be sharpened as they last a surprisingly long time between sharpening.