In the 1960 era, I recall being fascinated by a product from ADOX being a syrofoam box with a bunch of brown glass bottles of something called "Adox E-10" developer. Each bottle had an aluminum cap, and contained 10ml of developer which was to be diluted with 500ml of water.
I only ever had two of them, and found they worked wonderfully, but when I tried to get some more found that Adox was gone. (years alter I found Efke had bought the line) But I never saw the handy pack of developer again.
I recall Ansco had a "Kit" with 16oz of each of the chemicals for Anscochrome, all in foil pouches. Never was brave enough to attempt that process.
I do fondly recall the Tri-Chem pack. There was a companion product of 6 packets to make 4 oz each of Microdol-x. Since you could use Microdol-x 1:3 with water, each envelope in effect made 16oz of developer. enough for 1 roll of 120. (or 2 35mm if you did not mind overdoing the capacity)
Around that time I found the little brown bottles of Agfa's famous film developer and used that for years.