[hs]

that's it, $100 knife is wonderful till you lost it or break it

$10 knifes, you can afford to have spares

another example, i no longer use mechanical pencil because it betrayed me so many times (i can't see if there's extra lead inside)

transparent mech pencil is better, but i often forget to bring extra leads :(

that's why i buy 96 counts pencils for $5 ... the lead is visible, it never fails me

and no, i don't bring sharpener (you can always break the pencil and 'sharpen' the lead against rough surfaces)

i bring 5 sharpened pencils instead and put the rest in various places

although it's redundant (to ensure reliability), it's simpler and i'm much happier