From Colorverse's Season 2 Astrophysics, these glass bottles of Supernova come as a pair in 65ml and 15ml - one for home, one for sharing or for work, or pen meets!
This ink is dye-based fountain pen ink.
Colorverse inks are made in South Korea and are complete with thoughtful design, adorable accoutrements, and very cool packaging.
Image credit - Colorverse