Originally Posted by akthor
I tried and am unable to drill holes into the tray to screw it to the fridge.
Seriously? The fridge door is made of steel less than 1/8" thick. Self tapping screws don't even require a pilot hole. You can use masking tape to hold an L bracket to the underside of the drip tray and place it on the floor for stability, and attach the L bracket by running the screws in. A thin gopple of silicone where the screw pops through will prevent it from leaking.
I hope the reason is that you aren't allowed to "damage" (improve) the refrigerator, but then again, isn't there a hole above said location with a beer shank coming through?
I don't know the meaning of "Can't"
Update: Stainless Steel is not attracted to magnets.