Bought a seat post ages ago, still have the bag and not sure what to do with it?
Has been sat in a box but now there is the mother of all clear outs happening and it just isnt pulling its weight.

Are they useful for anything other than pretending your seat post is like new when selling it?

I use mine for keeping things in.

They make great if somewhat short condoms 😉

My guinea pig uses mine as a sleeping bag when it goes camping.

I put a snooker ball in mine and beat grannies over the head to steal their pension money.

Use it as wrapping paper for a 'toy' for the Mrs.

Offer it on the classifieds for a swap. Best offer gets it, you might get something fun!

I keep my trail tools and spares in mine.

I have tent poles in mine.

Dildo storage.