Systane Hydration Multi-Dose Preservative-Free Eye Drops Dry Eye Relief Twin Pack (2x10ml)

Formaldehyde in this?

Because there is no preservative in these drops do they need to be refrigerated after opening? What is the shelf life once opened?

Can't buy with HSA?

Whats up with ugly tip designs? Same thing with Bio true. These two brands that work great with my eye driness but tip design god awful