The ink is part of the season 3 Multiverse series.
String theory say that a Brane is a physical object that generalizes the notion of a point particle to higher dimensions.

Two bottles of ink in one package - a big one (65 ml) - String and a small one (15ml) - Brane.

Made in South Korea.

Technical aspects:

Brand: Colorverse
Type: Bottled Ink
Season: 3 Multiverse
Color: String - Yellow / Brane - Green
Shimmer: String - No / Brane - Yes
Sheen: No
Shading: No
Surface tension: String - 67.0 / Brane - 56.0
Ph: String - 7.7 / Brane - 8.6
Water Resistant: No
Volume: 65ml + 15ml
Bottle Material: Glass