I'm talking about saline solution for contact lenses
. This stuff can be expensive, so I will share with you a money-saving tip.
When you have contact lenses, you need three types of fluid to service them. You need a cleaner, a rinser, and a storage solution. Here's the thing: storage solution can be very expensive. It is usually (and should be) marked "for disinfection". Don't use this stuff to rinse your contact lenses! Instead, buy the cheapest saline solution you can find and use that to rinse.