There is a trend away from favors at bay and wedding showers. It is an added expense for what constitutes unwanted, unneeded junk that people generally take home and deposit in the trash. If you have budgeted funds for favors, consider making a donation of a book to the library in the name of the parents or the new baby.
The number 1 online source for cheap flowers is http://www.cheapflowers.com/. You can order all types of flowers, such as roses. For a baby shower you can organize a basket according to your tastes or the tastes of the recipient. They are all very cheap.