Try swapping out the pen you always misplace for the TIPEN Tiny Multiuse EDC Pen. This pen, which you can select in aluminum or titanium, is durable enough to last a lifetime. It may be seem easy to lose, but you can easily attach this pen to the included lanyard keychain so you'll never forget it. It's just 50 mm long and weighs no more than five grams, and it also functions as a zipper pull. Plus, the pen is refillable in the event that you need to do so. And this pen is waterproof and fireproof, and it can even endure being smashed. So if you need to write a note while you're scuba diving, this pen is up to the task. On top of all this, you can use this pen as a tool to open packages.