A recent purchase is this handy compact brush. It is a mirror with a unique pop out brush made by Denman. This is a company that is based in Northern Ireland.
When you open it it looks like this.
You simply push the bristles through from the bottom to get the brush out.
It is ideal as it folds away very neatly and won't gather any fluff or dirt from your handbag. Likewise any hair on the brush won't be escaping into your handbag. And with the mirror I think it's a genius idea!!
This cost me £2.89 from Boots.