Thanks to Costa changing their reward scheme a while back I now only have 1 month remaining to use the free drinks I have left.. and thanks to them changing their milk-free options from Alpro to something horrible we've given up on going there until it's sorted! At this point I'd rather they were used than just expired.
There's no way I can prevent one person from redeeming all the codes other than to hand them out individually, so if you want one please send me a private message and I'll send you a code until I've run out - I'll post a reply here when I do. 
To use the reward code you need the app:
swf3j.app.goo.gl/app
If you're creating a new account please enter my reward code:
FSKID
when asked if you received a code from a friend as you register - this way you’ll get 5 free beans the first time you pay for a drink. 8 beans equals another free drink. You get double beans if you use a renewable cup.