$120 for a milk jug

I had to have my radiator overflow reservoir replaced today. Been putting it off for a couple weeks because it cost me $120. The reservoir is just a 1/2 gallon or so plastic jug with a hose attached to catch the overflow from the radiator. I went to the supermarket looking for an adequate replacement that would cost me about $2, but the ones I found were the wrong shape. I guess the money is well-spent then, for something as custom made as it is.

Luckily, the shop installed it for free.