First off, make sure you used the Liquid Measuring Cups ONLY with liquids!

Secondly, use those cute little cups that say 1 cup, 1/4 cup, etc., those are called Dry Measuring Cups! As stated in their name, its meant to be used ONLY on dry ingredients. For more detail on Liquid Measurements Vs. Dry will be on another day.
For now I'm going to show you the most used measurement equivalents that are used in the baking industry.
Dry Volume Liquid Volume Weight (Mass)
3 tsp = 1 Tbl 8 oz = 1 c 16 oz = 1 lb
16 Tbl = 1 c 2 c = 1 pt
Weight of 1 c varies!!! 4 c = 1 qt
tsp = teaspoon
Tbl = Tablespoon
c = Cup
pt = pint
qt = quart
oz = ounce
lb = pounds