This year my coworker and I turned the outside of our cubes into Walt and Jesse's RV, and I built a bubbling, smoking, meth lab in mine, complete with blue rock candy "meth". It was a huge hit!
Check out the video tour!:
The RV was "sketched" out onto cardboard with colored duct tape fairly hastily (hence the octagonal wheels).
I used a cheap aquarium pump that I got from Amazon under $10 (Tetra Whisper Air Pump) to make the bubbling bottles. I drilled holes in the caps, an ran aquarium hosing from one bottle to the next, sealing it with hot glue where necessary. The liquid is just water with a little food coloring in in.
I printed out the "methylamine" labels in word, and glued them to empty recovery drink jars which I had saved up.
The lights are "meteor lights" (icicle lights) that I got on ebay, flipped upside down. (I just wanted the lab to look more "alive".)
The "smoke" was simply hot water and dry ice. A liter of hot water and a couple chunks of dry ice was enough to push the fog through the dryer ducting.
You'll notice I got to re-use the bar top I made last year for my "Roaring 20's Speakeasy" theme.
We bought some blue rock candy and put them into the little bags you get with clothes that have extra buttons/lapel stays in them. I found this scale for $2 (along with some of the glassware) at Goodwill! It was perfect!
A cheap set of erlenmeyer flask from Amazon filled with salt mixed with a drop of food coloring finished off the props.
I also used the blue salt and dry ice to serve "meth-laritas" (blue margaritas) which were a huge hit! (I made sure to pour the blue curacao in from a flask for show.)