Answer:
If you mean 1/3 and 2/3; The answer is (1/2) teacup = 1 full container.
Explanation:
(1/3)t = (2/3)c, the t for teapot and c for the container.
Multiply both sides by (3/2) in order to get 1 on the right-hand side.
(3/2)(1/3)t = (3/2)(2/3)C
(1/2) teacup = 1 full container.