1) Containerful 2) Dosage amount 3) Teaspoon 1) Dose 
• (n.) As much as teaspoon will hold; enough to fill a teaspoon; -- usually reckoned at a fluid dram or one quarter of a tablespoonful.
Tea'spoon`ful noun ; plural Teaspoonfuls As much as teaspoon will hold; enough to fill a teaspoon; -- usually reckoned at a fluid dram or one quarter of a tablespoonful.