I found one of the feeders linked below at Walmart & loved it! The bottle is glass, but the base and top are plastic. Both parts unscrew for easy cleaning. Not only that, but there is a little knob that you can turn in the base to retract or extend the perches. I liked the design so much that I bought two more online! My hummers seem to approve, too!

Here is a link that might be useful: Garden Jewels 476-3 Twenty Ounce Glass Hummingbird Feeder by Opus

My favorite feeder is the Hummzinger, but it isn't glass. It does, however, last for years and years. I like the design because you can see the hummers from all angles. Also, it's very easy to clean.

For a nice glass feeder try Dr. JB's. I have one and the hummers like it. It's also very easy to clean.

Carol

Here is a link that might be useful: Dr. JBs Feeders

No gravity-style feeders like these exist that woodpeckers or other birds won't be able to tamper with. Squirrels, wasps, and bees are other issues you'll deal with. I also use the Hummzinger basin-style feeder and have none of these issues...just hummers. But there are many who swear the hummers prefer glass feeders. To each her or his own.

I looked over the humzinger and I decided I liked the looks of it and bought three. (basin type) They sit up nice and straight and they have a life time warranty. I don't think you can get any better than that even if they are plastic. I do have an Aspects glass hummingbird feeder that I think is nice. It looks like a lantern, but I like the hummzinger best.