PepsiCo, the global soft drinks giant known for its Pepsi brand, mountain dew, among others said on Thursday that its fourth-quarter profit rose 31%. However, the Chief Executive Officer, Indra Nooyi warned that continued weaker economies abroad could upend the U.S. economy.

The snack and beverage maker reported the best performance at its North American drinks unit in three years, with U.S. consumers willing to pay more for its products on the strength of cheaper fuel prices and a strong U.S. economy.