Presents for Ushers and best man

What presents have you all got for their ushers and best man, or what ideas do you have? My H2B has been a bit of a diva and is having 4 ushers and a best man so want to try and keep presents to around £20 each for ushers and a bit more for best man. I did think of cuff links but most of them don;t need to wear suits for work so they would probably end up gathering dust after the wedding. Totally lacking inspiration at the moment!