I know exactly what you mean! There were a few times where I was faced with exactly this situation! So in an effort to NOT do that, I went and bought 6 bags of tranquility ATN's and 3 bags of tranquility slimlines. I've used both before and like them, and I know I can depend on them for everyday usage. Once I get them, I'm planning to start wearing 24/7 for a week, just to see how things go. I'm gonna take all of my regular underwear, throw them in a bag, and then padlock that bag shut. I'm not sure where I can put the key though, and I don't want to be tempted to just pull out some regular underwear in the middle of this trial lol.