Hummingbird/Nectar birdfeeders are available in many different styles. Some are decorative while others are not so beautiful .. but functional. 
All hummingbird feeders are made to hold hummingbird nectar. Your personal tastes will lend to what type you choose. You can make your own nectar recipe or buy pre-made hummingbird nectar mixes.
Types of Hummingbird/Nectar Feeders
- Hummingbird Bottle or Gravity Feeders – Bottle feeders have an inverted bottle which empties into a feeding port container or tube below the main body. They are often colored red. They come in glass or plastic.
Hummingbird Saucer or Dish Feeders – Saucer feeders for hummingbirds are most often in a red, dish like container with a cover. Tiny holes are in the cover through which the hummingbird can sip the nectar. These holes are large enough for the beaks of a hummingbird but often too small for the beaks of larger wild birds. Saucer hummingbird feeders are glass or plastic. - Oriole Feeders – An oriole feeder is essentially designed the same way as a saucer hummingbird feeder but is larger, has longer perches to support orioles and other birds larger than a hummingbird and is usually colored orange instead of red. Often you can skewer an orange half on the top of the feeder and give orioles both nectar and orange citrus slices which they love.
Hummingbird/nectar feeders are often made of plastic although glass is popular for the more decorative hummingbird nectar feeders.
The advantages of using glass hummingbird feeders or metal hummingbird feeders are that they are easier to keep clean than plastic. Glass syrup holders provide slightly better insulation from the sun and they also last longer than plastic feeders.
The down side of glass is that it is breakable and heavy.