If something breaks when you are out and about, yes you could call for help or you could reach into your pouch and pull out Sugru. break the seal and patch your problem. Now this is a quick fix but it will get you home. Extremely clever scientists have been working on sugru for over 5 years to give it as many great physical properties as possible, so it can be as versatile and useful as possible for you. Sugru can help you dramatically prolong the life of your stuff. By applying in some cases even a teeny tiny bit to your things, you get to keep them for much longer and decrease your impact on our wee world. Repair with gusto!
Now the downfall is that you have to use it within 6 months, now if you have kids I am sure this will be used up in a sec.