PepsiCo Inc. (PEP) sees annual synergies of at least $200 million through the consolidation of its two anchor bottlers, significantly under an estimate one of the companies made during a Tuesday conference call.

PepsiCo, which has faced resistance in its effort to acquire Pepsi Bottling Group Inc. (PBG) and No. 2 bottler PepsiAmericas Inc. (PAS), said it saw "no justification" for Pepsi Bottling's estimate of $750 million to $850 million. According to PepsiCo, Pepsi Bottling previously had indicated it believed the figure was well below $100 million.

The bottlers have maintained that the proposed deal with PepsiCo undervalued potential synergies from a buyout, although specific figures weren't made public before Tuesday.

PepsiCo said the proposed acquisitions would allow the company to reshape its business and to improve its competitiveness. It maintained that it has offered "a full and fair price" for the shares of Pepsi Bottling it doesn't already own.

PepsiCo currently owns 33% of Pepsi Bottling and 43% of PepsiAmericas.

The bottlers' refusals have been widely viewed as more of a negotiating tactic than an outright balking at a deal.

Earlier Tuesday, Pepsi Bottling raised its second-quarter and year earnings forecasts, citing improved results in the U.S. and Canada, as well as easing commodities costs and foreign-exchange volatility.

Pepsi's shares were up 4.3% at $55.40 in recent trading, while Pepsi Bottling's shares had risen 3% to $34.20 and PepsiAmericas' shares were up 2.2% at $26.92.

-By John Kell, Dow Jones Newswires; 201-938-5285; john.kell@dowjones.com