My feeder is metal and I haven't tried plastic feeders. My parrot and doves are using the little 1 gal plastic waterer, and I like it for ease of cleaning, using apple cider vinegar and being able to see the water inside, how much and if its clean. I have other friends that replace the base for that size on a regular basis due to breakage. My one experience with the larger plastic waterer has not gone well, and so far I like metal waterer better. I can feel for the weight to check water supply, not as handy as seeing it, but I expect the metal waterer to last a good while.