I've smoked three-four bowls from the same pipe in the same day, I just keep an eye on whether it is gurgling more than normal or if the smoke feels wet or steamy.I do however smoke the same mixture or class of mixtures on those occasions. I have ten briars and three cobs and a meer that I use regularly, but my pipe pouch only holds one pipe and the other tobacco pouches don't have a pocket for one, so when traveling I just have one with me and expect it to get used often.