Songbird Essentials Nectar Protector Junior-Clear/Bulk Nectar Protector Jr.-Clear/Bulk. All of the features of SE620 only in bulk with only a bar code/name label. Ant deterrent which holds twice the amount of water than others meaning it does not have to be refilled as frequently. It's clear so it doesn't confuse Hummers. You can see when it is empty. Comes with S hook, fits 100% of feeders even decorative feeders.