what about in summer then when cold liquids are preferred?A meal can take up to 5 hours before leaving your stomach completely. Waiting 1 hour likely would have no effect as much of the food would still be in there. What might make a difference is the temperature of the liquid consumed with the food. Drinking a cold liquid with a starchy meal would modify the starch making it less digestible. If I remember correctly the Chinese have been saying for a very long time that drinking hot liquids with food improves digestion while cold liquid hinders good digestion.