No amount of ounces will ever be equal to the glass.
However, an "8-ounce glass" is described that way because it has
the capacity to hold eight fluid ounces of liquid volume.
That is 1,152 fl oz.
4 gal = 512 fl oz
That is 256 fl oz.
That is 192 fl oz.
That is 192 fl oz.
That is 64 fl oz.
That is 256 fl oz.
That is 1,536 fl oz.
That is 384 fl oz.
1 US gal is 128 fluid ounces, so 2 gal is 256 fl oz.
3.56 gal x 128 fl-oz/gal = 455.68 fl oz
Assuming a 22 gallon capacity 1 gal = 8 pints; the number of fluid ounces depends where you are: * In UK: 1 pt = 20 fl oz → 1 gal = 8 × 20 fl oz = 160 fl oz → 22 gal = 22 × 160 = 3520 fl oz * In USA 1 pt = 16 fl oz → 1 gal = 8 × 16 fl oz = 128 fl oz → 22 gal = 22 × 128 fl oz = 2816 fl oz