US soft drinks and snacks giant PepsiCo said second quarter pre-tax profit rose 13% boosted by strong volume growth at its Frito-Lay snacks business and cost savings from its merger with Quaker.

For the period to June 14, PepsiCo said pre-tax profit increased to $1.45m from $1.28m last year on sales that rose 7% to $6.54bn from $6.12bn.

PepsiCo said the he 2001 merger with Quaker Oats in August 2001 whose products include Gatorade sports drinks contributed 5% to overall earnings growth.

The company said its worldwide volume rose 5%. But cool weather across the US hit beverage sales at the start of the peak summer selling season.