WASHINGTON (AP) _ A fast food restaurant chain is voluntarily recalling 300,000 sports water bottles because the mouthpiece can present a choking hazard to children.

Taco Bell Corp. of Irvine, Calif., began last Monday offering the bottles for 99 cents to customers who made food purchases at its 2,700 stores nationwide. But the promotional campaign was suspended three days laer after the company ''received a report from a customer that his 21-month-old child had dismantled the bottle's mouthpiece and attempted to swallow it,'' the Consumer Product Safety Commission said.

When a CPSC inspector tried to purchase a bottle last Friday he was told store managers had been instructed to pack them up and ship them back the day before, the agency said in a written statement.

''It's the fastest work on a recall I've ever seen,'' said CPSC spokesman Dan Rumelt.

Consumers should return the bottles to the Taco Bell where purchased for a full refund.

More than 20 million of the water bottles, which have become a popular fixture among sports enthusiasts, have been marketed in the last ten years by Specialized Bicycle Components of Morganhill, Calif., according to company president Mike Sinyard.

Specialized has redesigned the bottles and plans to ship them to customers like Taco Bell by June 25, he said.

The company also will replace mouthpieces on all other bottles it distributed. Consumers should contact Specialized at 1-800-735-4668.