Really? The stirrers are cheap (they cost the stores about $1 for 100 and have the stores name/logo inked on for added advertisement. The openers are nearly as cheap. Both are just something cheap to throw in to gain/keep customer loyalty.
Nope. You want a stirrer or posh dedicated paint tin opening tool in the UK, you bet your butt you're going to part with at least £10. It's the UK... nothing is free!