The worst thing about losing a lens cap is having to buy another one. You can go with a generic but ugly replacement and save a few bucks, or you can buy the manufacturers official version, which will make you hate yourself.
Now there’s a third option – don’t lose the cap in the first place. Instead, spend $10 now on Photojojo’s Hufa Lens Cap Strap Holder, and never buy a cap again.
Unless you’re a hipster – you can still buy as many sweet ironic trucker caps as you like.