Teaspoon
There is more than one type of teaspoon:
A US teaspoon is 4.93ml: US teaspoon
A UK teaspoon is 5ml: UK teaspoon
Metric tablespoons
A Metric tablespoon is unit used in cooking and baking to measure ingredients such as liquids, powders and granules. One tablespoon is equivalent to 15 milliliters making it identical to the UK tablespoon.