LMC Wiper Arms + Washer Fluid Reservoir Question

[BigSix]

Would you folks suggest the LMC wiper arms or is there a better source? I have one good arm that has a wiper blade on it but passenger side has a bent arm that won't take a blade.

Also - next to my radiator is a small sorta cube shaped plastic container with a steel mount bracket...is this for washer fluid? There is no pump nearby so that may be missing. The bottle has gradients on the side that tell you how many pints (maybe quarts?) are in it. I can't tell if its an overflow bottle for the radiator or for washer fluid. Any pictures of how the washer fluid system is supposed to look would be awesome.