Misto... what the HECK is that? I found this bad boy at Costco in a 2 pack for $20, SCORE. Instead of paying $3+ for PAM, which isn't all that great for you, I use my OWN olive oil and make my life a little easier and A LOT cheaper over time! All you do is put your own olive oil inside, pump and SPRAY! No aerosol cans, propellants, watered down oils or chemicals needed, use on grills, pans, baking, salads, etc. You can find at Bed Bath and Beyond for $10 if you don't have a Costco membership!
Fellow blogger agrees and even does the research..."The cheapest I've been able to find cooking spray is at Walmart -- you can get a can of the store brand for around $2. Buy the name-brand stuff and your price goes up. For the $2 can, you're getting about about 185 grams of oil. I figured this by checking the nutrition label's serving size. A serving size (according to the label) is .25 grams. I multiplied that number by 741 (the amount of servings in a can). Once that number was calculated, I found a conversion table to help figure out how many grams are in a cup. Turns out, the conversion varies from food to food. For oil, there are 224 grams in a cup. (I checked another label for a name brand can of cooking spray and there's less in it -- around 158 grams). So, really there's less than a cup of spray in your typical can of cooking spray.
Take it a step further: that's not all oil in the cooking spray. While they all contain some kind of oil (canola, soybean, olive, etc.), you will also find a bunch of other ingredients in a can of cooking spray. Some of these extra ingredients include things like grain alcohol (added for clarity), soy lecithin (an emulsifier), dimethyl silicone (for anti-foaming), dimethylpolysiloxane (another anti-foaming agent), natural and artificial flavor, and propellant. I'm not necessarily saying that these are all bad (though, what is 'propellant' anyway?), but it is a bunch of extra stuff." (http://theparsimoniousprincess.blogspot.com)"
Also take into consideration that PAM and other sprayers advertise the calories used when spraying for 1/3 a second... I don't know about ya'll but I don't cover a whole pan within 1/3 a second... so how many calories are YOU REALLY consuming? Advertisers are allowed to say "ZERO calorie" or "FAT FREE" because it meets the minimum requirement of that 1/3 second.. pretty shady right?
"Some of the mystery surrounds this idea that nonstick cooking sprays allow for fat-free and calorie-free cooking. This makes us scratch our heads a bit, seeing as how the main ingredient is oil and so far we haven't heard of any fat-free oils being produced.
In reality, this is a bit of tricky (some might say, subversive) advertising. If there are less than 5 calories or 0.5 grams of fat in a single serving of something, the company is legally allowed to advertise that product as zero-calorie and fat-free. Our problem is that most cooking sprays say that one serving is equivalent to a 1/3 second burst, which seems almost impossibly brief to us. Even if we had the reflexes to only trigger the spray for 1/3 second, we can't imagine getting an entire pan coated in that period.
So how much fat and how many calories are you actually cooking with? According to the Pam website, there is about 1 gram of fat and 7 calories in a one second spray of their product. Other products are roughly equivalent. For comparison, one teaspoon of olive oil contains approximately 4.5 grams of fat and 40 calories."
More from: http://www.thekitchn.com/thekitchn/food-science/food-science-the-science-behind-nonstick-cooking-spray-071468