Floating Flower Tip - Most flowers float pretty well on their own until they start to pool with water and slowly sink. For a longer lasting centerpiece, use bubble wrap to make little skirts for your flowers.
Brudslöja are what the little white flowers are called and i just find them so pretty. Small little table center pieces wit these and then one bigger one for the main table. With lilac roses. And little flower sticks with table number :)