Curious of otherīs use of something like this,

riding in the winter means carrying some extra clothes and/or rain gear, and this makes it hard going inside, without a lot of extra bulk and looking like a cyclist.

Budget should be reasonable, after all prying eyes may want to break this apart and it's hard to have something really secure that's not heavy.

I don't have enough posts for submitting, but ebay items with ids below show some quick research in the 10x10x10 (inch) size, and under $30.

272378141427

or

142529434327?