XSPC Bay single bay Reservoir
 

Now maybe it is only a reservoir and not something to sing and dance about, but I have to say for me it is the best bay res on the market, for the first point it takes up only one bay instead of two and it can do this due to the dividers design layout. This is what makes it possible for the fluid to get right down to the lower levels indicated on the front without letting the output get air, even with its ¼ threads. I was shocked when I had to drain the system for a mobo change and even with only a few mm of water left the output section was still full! I can’t think of any other single bay res that employs a system like this that works so well.