Teaspoon
There is more than one type of teaspoon:
A US teaspoon is 4.93ml: US teaspoon
A UK teaspoon is 5ml: UK teaspoon
US dry gallons
A US dry gallon is a unit of volume measurement normally used for dry goods such as grains, fruits, and vegetables. It is about 4.40488 liters or 0.16 cubic feet.
Note: The US dry gallon is different from the US liquid gallon, which is used for measuring liquids and is slightly smaller in volume.