I used liquid nails, the second i turned the keezer on... BAM it fell off, denting the wood. (The heat from the freezer coils exchanging heat)
I ended up using Araldyte.. I can lean on it (95kgs) and it doesnt budge. I regularly put my 5L jug on there and fill it up as i'm cleaning the lines rather than standing there holding something to run it in to. I think it could hold a small child.
Make sure you clamp it (get a couple of 90x45 peices and clamp from the top and brace at the bottom with weight and jam it in there), OR if possible, lay the keezer down on its back, as Araldyte does run, i had some runs and it just needs a sand and repaint (i painted mine black with dark stained pine).