Unless you want to water the grass at Dolores Park with what's left of your 40, be wary of patrolling cops in the next few days, especially with the beautiful weather forecast.
SFist reported Wednesday that SFPD has been asking people to get rid of their drinks. The reason for the action is unknown (besides it being completely illegal, of course).
Although the reality of police asking all park patrons to empty their cans and bottles over the crowded weekend seems unlikely, don't say we didn't warn you. Don't be surprised if they ask you to put out your cigarettes too.
If you're going to do it, enjoy your public booze on the down low.