It is very unstable, the vertical supports are metal but very thin. It did its job between the fridge and the wall for 2-3 bottles and some cans of soda. It required the help of 4 screws and a hot glue gun to be able to roll without falling apart.

Update: 3 months later the wheels broke and now it just drags on the floor. Was it the 5th soda bottle's fault? I will never know.