I cut open one of those ice bags that they sometimes use in shipping cold stuff. I squeezed some into a White Labs vial and then placed the probe in along with the probe from a outdoor thermometer, and duct taped the top closed and relatively sealed. I only filled the vial about 1/3 full as I wasn't sure how much thermal mass I wanted. (Larger thermal mass= bigger dead space)
I plan to do a more professional job (once I have proof of concept) by drilling a hole in the original cap of the vial and running the probes through that hole and sealing it with wax.
On Tap: 1. Kelly R. IPA, 2. Roter Hund Hefeweizen, 3. Bud Killer Blonde, 4. Red Dog Pale, 5. Roter Hund Oktoberfest, 6. Pumpkin Ale, 7. McRed's Stout (with new nitro system and stout tap,) Cream Soda, 8. ESB # 3, & 9. Ordinary Bitter.