how many ounces is a mighty mug
Mighty Mug Facts. 1  This mug holds 20 ounces and fits in most vehicle cupholders. 2  It is taller than a regular mug, so it is best to use The Mighty Mug straw but a disposable straw will still work.3  The all purpose lid allows you to either drink with a straw or drink straight from the drinking hole in the lid. It is taller than a regular mug, so it is best to use The Mighty Mug straw but a disposable straw will still work. 2  The all purpose lid allows you to either drink with a straw or drink straight from the drinking hole in the lid.