RayFIt is made by sailor in sailor bottles (which is why bungbox is now kind of a scam, it used to come in those lovely vial shaped bottles but now that it doesn't, the price hasn't dropped either) but bungbox inks are unique colors to the store in japan.
Doesn't mean I don't agree with you 110%. It is obnoxious as hell that sailor has doubled its prices for inks in the last 2 years while keeping one of the very worst bottle designs on earth, while pilot knocked 30% OFF it's prices for iroshizuku while still keeping the same top tier bottle design.
Annoys me all the further because tokiwa matsu is my favorite ink.
HoneybadgersSome time back I decided it was wise to stock up on inks you really like because as you describe, bottles and colors have simply become fickle marketing devices--here today, gone tomorrow!