As you've probably gathered by now, I was instinctively a little skeptical of Colin's math from the begining, so I went back and did what I should have done before my initial response to him, which was colored by my reaction to his tone: Check his numbers and mine. The results are as follows: Cost of 125 packets of WHO formula from Jianis Bros, providing 8+ pounds of WHO formula in sealed packets with a shelf life of 5 years is $70 + $18.90 for shipping(calculated from KC, MO to Seattle) = $88.90. Cost for Colin's ingredients, as calculated from dummy purchases on EBay for an equivalent amount of ORS powder to be mixed by you, again calculated to my Seattle address are: 8 pounds of brown rice syrup solids is $44 + $16 for shipping = $60; 8 oz of Sodium Citrate is $4.25 + $6.30 for shipping = $10.55; 1 pound of Potassium Chloride for $2.96 + $5.99 for shipping = $8.95; This works out to $79.40, so Colin's approach is $9.40 cheaper than mine, not counting a couple of bucks for baggies. Then there is the hassle of spending who knows how much time bagging the stuff up, cleaning up after, and finding a way to store it properly so it doesn't degrade over time. Yes, you could order in smaller batches, but then the disproportionate shipping costs would quickly eat up whatever cost savings you see above, because there is always a minimum shipping charge involved. The choice is up to you, but I now feel that you have the true cost data you need to calculate whether the time and effort involved is offset by a maximum savings of $9.40. Colin's approach certainly does not cost 1/100 of any commercial product, and is marginally cheaper at best. Good luck, whatever you decide to do, and I apologize to you and the rest of the community, excluding Colin, for my contribution to any unpleasantness. This was thread that should have remained strictly informational.