Would You Buy Mini Fridge Just for Beauty?

I would! And I should. 
Currently, I keep all my [cold] skincare items in my coffee bar mini. 
Not the Best place, but it is sort of a step up from being in our main fridge. 

When it comes to masks and rollers and oils and cremes, I Live for a good product that works. Most times is more beneficial to use them cold. It helps to extend the shelf life of your products and increases their effectiveness; keeping your items cool also improves circulation, reduces inflammation and redness. Some studies even show that it can help to stimulate collagen production decreasing the appearance of fine lines and wrinkles over time - soo many benefits. It's sort of the same concept as cryo facials|therapy but a tiny little version you can do on your own at home for a relaxing evening in. If the benefits are what they say they are, I'm All for It! Plus, I just think it feels good to use a cold roller and that's enough for me.

Now, Do you NEED one, No. And with price points starting at $40+ (not including the cost to run it) you should be Into your skincare to even consider it. Otherwise, it's a $60 unit that will just sit and collect dust and expired goods. However, it IS a nice perk to have all (or most) of your beauty items in one place so that you aren't going back and forth between rooms to complete your nightly or weekly routine. This is the one I'm pulling the trigger on in .5 seconds: Black Mini Fridge w|Cooling + Warming - 4Liter Capacity. Pretty affordable and black. Cause - Stains. Let's be real. Lately, I've been obsessed with masks, exfoliators and oils. Cremes...Meh. Only if they are A-mazing. That being said, what you should keep in your mini-fridge for maximum effectiveness varies. As a good rule of thumb, any creams or serums [especially with vitamin C] are ideal for storing in the fridge. Things you only use once in a while will be kept safer stored cool, as well as anything that's organic because they tend to have a shorter shelf life. If you're ever unsure, read the label (they usually have a ° variable they can live in safely) or consult with the manufacturer but here is a small list of things that are generally okay:

Remember to always check your beauty products often for freshness; expired products lose their potency and can cause severe adverse skin reactions when they've gone past their life span.

So, When In Doubt - Throw It Out!