Mini Fridge for Baby Formula overnight

We are expecting our second this may and just wondering if anyone has used a mini fridge in their room for baby formula?

I'm looking at those small mini fridges that hold maybe six cans of soda. If you've used something like this, what brand did you use?

My concern is that it won't stay cold enough for the formula to stay fresh.

In our old apartment it was somewhat easy to grab a bottle from the kitchen overnight.

Our new place has bedrooms on the second floor and the kitchen is downstairs. ..just trying to think ahead and make those overnight feedings a little easier !