They’re called Gelly Roll brand because they’re made in the Gelly Roll Patisserie. With neon lime teas and glittery cold soups, creamy pastel cakes and matte gloss macarons, it's where ink imps go to eat.
The imp bakers branched out to stationery because they felt bad for not offering any human-friendly products. This is why our craft stores house racks of them.
Check your gel pens regularly, especially brand new ones. If they seem to be out of ink, even if they worked just fine yesterday, a nearby ink imp may have swiped your pen for a refreshing beverage.