I have a buddy that owns a Cadillac Seville. At some point the overflow nozzle broke off of the radiator coolant overflow bottle. You can see it pictured here:
After a trip to AutoZone I was able to build a replacement nozzle out of some vacuum hose and a nylon fuel line union. Here it is.
I used a little QuickSteel to adhere the new nozzle in place after prepping the bottle (read the instructions on the back of the package).
Then I used a little more QuickSteel to make sure it wasn't going anywhere.
Once it cured (one hour), I put the old hose on and tightened down the hose clamp.
Now, it's as good as new.
Here are the supplies I used (less than $20).
That's a lot better than spending $100 on a new bottle.
You can find one of those here: