Convert tumbler (U.S.) to ounce (fl oz) (U.S. food labeling)
Selected category: volume.
Definition and details for tumbler (U.S.):
Tumbler is another name for the U.S. cup.
Definition and details for ounce (fl oz) (U.S. food labeling):
US regulation 21 CFR 101.9(b)(5)(viii) defines a fluid ounce as exactly 30 millilitres for use in nutrition labeling only.