some tweaks

main.tex

@@ -33,9 +33,14 @@
    {ml} {240}    % this unit already exists
    {cup} {1}   % 1 (US Legal) cup is 240ml. We're not converting to oz cause that would require implementing fluid ounces, which is outside the scope of this project. Maybe I'll do good on making a PR for the package.
 }
+\cuaddtokeychain
+{
+   {ml}  {30}
+   {oz}  {1}
+}
 \cuaddtounitgroup{volume}{cup}
 \cusetup{use-phrases=true}
-\cusetoptionfor{g}{round-precision=0}	%	rounds grams to whole numbers, I don't care *that* much
+\cusetoptionfor{g,ml}{round-precision=0}	%	rounds grams to whole numbers, I don't care *that* much
 
 %	Removing the numbers from the sections & sub-sections
 \setcounter{secnumdepth}{0}