Could be, any liquid up your Nostril, especially a carbonated one, can be quite irritating to say the least, not sure about disasterous though.
Anyway... My point, which I still think is valid, is that this thing, whatever it is, just seems to be another bit of tat that you could very easily live without, and have lived without for the whole of time, until someone sticks one infront of you and tries to charge you money for it... You could easily make a can holder, something to keep your shocks upright or even hold your ipod/phone/pad if you couldn't possibly cope with propping it up against something or just putting it on the table, for a matter of pence, or just out of junk that you have laying about. Why spend a bit of time making something you need when you could buy something off the shelf though....