Movie theaters almost universally do not allow outside food or drinks, so that isn't really an option. But these days if I ever go to a movie I pretty much exclusively go to a dine-in theater(alamo drafthouse, studio move grill, etc) because at least there I'm getting decent food instead of a paying $20 for tub of popcorn and soda that cost them probably less than a dollar, not to mention they have comfy recliners instead of those awful padded seats most theaters have.