The BOLT MugTop can hold 11 fluid oz, however we list the volume of the MugTop as 10 oz. Some standard coffee makers dispense 10 oz drinks, so we wanted our users to comfortably have room for the addition of coffee cream, syrups or sweeteners without risk of overflowing.
If you do like filling your BOLT MugTop to the max, you can use our included thermal lid to prevent any spillage.