Originally Posted by bennos

* Upgrades are limited and may not be available at all SkyClubs. You must first purchase a regular, non-upgraded drink. Upon confirming upgrade availability, miles will be deducted from your account and your drink will be reissued into the premium category. If you cancel your drink for any reason, your miles will not be refunded. Miles earned from drink transactions will be credited based on the original class of drink purchased. Drinks may come with up to 4" of extra headroom. Travel agents: Drink upgrades book into PU class.