Comparison of cup chicken waterers' design

[striperon]

Are all cup waterers designed the same? Do they all have the same valve mechanisms? Are there any that are less or more susceptible to freezing? Where would I find a comparison?

 

[ChickenCanoe]

They're all prone to freezing. I have 4 types and I had one blow up last week.

 

[striperon]

What make and model is the one that froze?

 

[ChickenCanoe]

It was one of the normal drinker cups. It was under 20 degrees, there was no water flow and it was 15 tube feet from the source barrel.
My fault, not the fault of the cup.

 

[striperon]

I have 2 pictures taken from advertising on the internet. They are each a different design. Can anyone show me pictures or provide a link for a different design? I am more interested in the cup and valve design. Thanks.