I was under intensive probation once. I kept a pipe buried in plant soil and weed hidden in the ceiling. Also kept the kratom up there. LSD in the freezer and pot seeds in the coffee in the fridge. The officers said they liked my cacti, little did they know that those produced mescaline. Sorry it wasn't all in the sock drawer when they did a shake down. In a hurry and the walls are drywall with posters and tapestries, punch a hole behind one and you have an instant hide. There are reasons why prison tv's have clear plastic shells. I would rather go without than shove something up my ass!
i would think it depends on the layout of the area you want to hide it in, and the habits of whoever you're hiding it from.
Even airport customs don't check it! https://www.google.co.uk/search?q=insulin+fridge&oq=insulin+fridge&aqs=chrome..69i57j0l3.9652j0j4&client=tablet-android-pega&sourceid=chrome-mobile&ie=UTF-8#imgrc=McUogofrMkSt6M%3A