Buying an extra glass so you've got two can be a good idea, to be able to get fills from breweries' both beers at once. Especially for the more hyped stuff, where lines can be long. Also make sure to take it easy between the sessions, eat, rehydrate etc, or the second half of the day(s) can get rough If you've got time outside the festival, make sure to visit places like Himmeriget, Koelschip, Warpigs, the Mikkeller bars, Brus etc. Shop at Kihoskh, Ölbutikken and the Mikkeller bottle shop. Also PM if you're looking to trade for EU stuff.
My tickets accidentally (?!) got sold to someone else so now on the hunt but still in Copenhagen during it so the list helps!
