Kordon/Oasis (Novalek) SOA80304 Bell Bottle and Hold Guard Small Animal Value Set, 4-Ounce, Variety Colors

Can this bottle be attached to a wire cage or is it made for aquariums? If it can attach to a wire cage, how does it attach to it?

would this be long enough to fit inside a 20 gallon tank? and does this ever have problems leaking?

How tall is this water bottle? Amazon is listing the dimensions as 1x1x1 which clearly isn't correct.

This bottle came with 2 balls inside, but 1 ball was inside the bottle and not the spout.. Is that a defect??