240 calories seems like it would need more calorie dense food to supplement. Upon your 18 day supply number crunching at 100 cost, that is only going to give you 720 calories a day...

I do not really see a viable long term use as other prepared foods would be cheaper and give comparable nutritional content.

Short term use would be questionable as well since our bodies may require more calories that what you get from this product.

I would not buy this product but I am also a very cheap man, but I would not refuse it and actually would be curious to try one out if they had a "try me for free" promotion