For more context, check the source

In case the source gets removed for any reason, Miku Expo 2024 NA has begun and an unofficial afterparty in San Jose featured Vocaloid-themed drinks. Each character has their own fancy drink (Miku Margarita, Rin Sunrise, etc) but Kaito simply has "Kaito Water: plain ol' bottle of water".

https://twitter.com/imcuteonline/status/1777622453008634006

luntoer said:

In case the source gets removed for any reason, Miku Expo 2024 NA has begun and an unofficial afterparty in San Jose featured Vocaloid-themed drinks. Each character has their own fancy drink (Miku Margarita, Rin Sunrise, etc) but Kaito simply has "Kaito Water: plain ol' bottle of water".

https://twitter.com/imcuteonline/status/1777622453008634006

DAMN. Not even a milkshake. Just plain water.

Harmonic_Vector said:

DAMN. Not even a milkshake. Just plain water.

No, you see, Kaito's drink is called "The Designated Driver"!