M&S Club Rewards - drink vouchers?

[BeaLola]

If you have M&S ClubRewards (£10 per month) I understand that apart from other offers you receive 32 drink vouchers a year – can anyone who has this advise whether the drink vouchers are for certain amount or can just exchange for a regular coffee thank you

Any hot drink I think

Any hot drink, I generally have the flavoured latte with cream on top, I have a sweet tooth. In the summer I have iced latte usually.