Most of us know the feeling of having a bottle of wine we wished was a good few degrees cooler. So what do you do? Hurriedly throw the lukewarm bottle into the freezer? Make (another) mental note to keep the fridge stocked? Or drink it warm (no, of course you're not that desperate). If you've got a Ravi in your freezer, you need never face this situation again. This nifty Canadian invention cools wine as it is poured and the level of cooling can be adjusted according to the type of wine being served.