I call these long Oasis bricks of foam "soak and poke". It's literally that easy! The Max-Life foam is covered with a dark green poly film which is perforated with tiny holes so you can soak the foam in water that has been treated with fresh flower food.
Then simply poke a small slit with your knife and insert the flowers and greenery. They make up really fast and are easy to transport. The added bonus? There is a built in styrofoam tray under the bottom of the foam so you don't even have to put them in a tray or container. What could be easier?