While hunting (camping with guns) one time I found that...

Canola oil is NOT a substitute for margarine or butter for boxed mac and cheese. Many Little Debbie (TM) cakes were consumed afterwards to get rid of the after-taste.

and

MRE applesauce, hot sauce, and Ramen (TM) noodles do NOT make a good, or even lousy, "sweet and sour" meal.

Anyone else?
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"Its not a matter of being ready as it is being prepared" -- B. E. J. Taylor