How Much?

Nipped into halfords for some antisieze, you have this small tube at £3.49 or you have a big tub at £7.99 but look a bit closer, the tub is £16 per kilo, the tube is £175 per Kg, bloody hell thats some mark up. Having said that I bought a small tube over 3 years ago and it's only just run out, I imagine this tub will be named as part of my estate in my will, to be handed down to whoever has shown themselves to be the least cackhanded mechanic of the future generation. My dad and his dad where very mechanically minded, I'm hoping it's only skipped a generation with me.