Basically; Terry came out with a product called formisazine which is a replacement for water in test tube setups,
It's advertised as "reducing stress" which it technically does but very indirectly. It stops bacterial growth in the water hence you get less moldy test tubes and that's why it's being advertised as "reducing stress".
This was priced at 15$.
In actual fact the product contains methylparaben (E218 - preservative) and blue dye and water as pointed out by Subverted.
edit: He's been using 1.5g mixed with 1 gallon water.
Ingredients that I've purchased for less than £7 and will be testing out next week.
Another product most of you are probably more familiar with is sunburst ant nectar.
Contains: Water, sucrose, sodium chloride, sodium hydroxide, methyl paraben, sodium tri-poly phosphate, tartrazine (for color)
This would be much harder to replicate as I am sure a lot of time was gone into working out the correct formulas, however if your like me who feed their ants a varied diet and who readily accept sugar water then a nice cheap alternative would be food dye + methylparaben mixed with the sugar water.