For some reason I think of it as an older concept. Now Starbucks and coffee chains are popular.

Seinfeld on instant coffee https://youtu.be/uDrh5pujB9I?si=VdlVEREjMTNd2Bs7

Highlighting carlcook’s advice:

dissolve in cold water, ONLY THEN add hot water. The rationale behind it is that aromatics evaporate too quickly when the instant powder is infused with too/boiling hot water.