I did this a couple of times in lock n lock container I used that held the base for my Mya Mini very well and then loaded it up. I no longer like to use ice though because I find it dulls the flavor a little bit too much in my experiences.
Also, HookahKev had a similar project in mind that he constructed. He used copper tubing to make a coil condenser which was built into a cooler so that the coil was submerged in ice water. He made a video of his most recent build on Youtube(http://www.youtube.com/watch?v=Y9m5X4PHK6Y