From this page of the Disco Elysium game guide, you will learn where to look for the Ice Bear Fridge.
The Giant Ice Bear Fridge is an item associated with several Disco Elysium quests. The refrigerator is located in a dark room in the building at the back of the bookstore (Doomed Commercial Area) - a flashlight will be extremely helpful to get through this area.
There are two ways to get to the Ice Bear Fridge, so choose the one that best suits the character you've created.
- Enter the bookstore and try to uncover the curtain on the right. The owner will try to stop you - talk to her, exhaust all dialogue options and admit that she's right about all the supernatural phenomena, then pass a Drama test to get the key to the locked room behind the curtain.
- You can ignore the owner and push back the curtain with force, then break down the door - it's required that you pass a difficult Pain Threshold test (you gain +1 to the skill when you examine the door first). At this stage, it's a good idea to have at least one healing item and save the game so you can try again if you fail.
After entering the back room, equip your character with a flashlight and go up to the upper floor. Go through the cluttered room and open the door marked in the image above.
The Ice Bear Fridge is placed in the center of this room.