So I acquired another 212 drinks this week. I managed to find Mt Dew at a reasonable price again, oh frabjous day! 
I also acquired a second sugarfree option, Diet Lemon. Our stash in the server room is now stocked up again.
In addition to this, both drinks machines have been loaded up as full as they can reasonably be without completely overloading the motors. This is the green room ācold drinksā machine with 420 drinks (yes I counted, I was curious how many it actually holds when full. Now we know!).
And in addition to that, the flavours offered & order of flavours in both machines have been swapped around. Just to keep things interesting, and to give more space to the more-popular flavours.
The new order in the green room ācold drinksā machine:
Coca Cola
Mountain Dew
Lemon (20 or so Kirks Lemon, then all Lift)
Lemonade (Schweppes Lemonade)
RAND(); (random flavour and no two in a row should be the same, currently stocked with 8 different flavours, some of which arenāt available in any other line)
Ginger Ale (Kirks)
Pepsi Next (to be replaced by a fully sugarfree Cola option once this line is empty)
600mL Water bottles
The new order in the warehouse āPort-Hack Colaā machine:
600mL Water bottles
Orange (currently Fanta)
Ginger Beer (Kirks)
Pepsi
Creaming Soda (Kirks Candy)
Diet Lemon (Kirks)
This should do us for a few months. 
For those who like numbers - we currently go through around 70 cans a week, over a third is just Coke. Because I try to get really good sales prices, it averages out that every dollar I spend buying & loading up drinks earns the hackerspace between $1.65 & $2.50 depending on the flavour. Definitely worth the ROI for my time.