When I wore monthly contact lenses I had lots of these cases around the house and in various different handbags. There was nothing worse than needing to take out your lenses after a long day and not having a case to put them in meaning you either had to throw them away, not a great option if they were a new pair, or you had to keep them in with your eyes getting increasingly drier and sorer. 

I have different prescriptions in my eyes, one is a bit stronger than the other so the thing I loved about these cases is that they had left and right marked on the caps so when you took out your right eye you could put it in the right case and vice versa, then you never had to worry that you had the wrong lens in the wrong eye. 

According to the information on these lens cases they are specially designed lens case for gas permeable (GP) contact lenses for use during GP lens disinfection, protein removal, and storage. My eyes always felt fresh when I first put these lenses in, it was as if I was putting brand new lenses in every morning so I think they did a good job of storage and cleaning overnight. 

The caps on these cases screwed on and off and I always found them quite easy to get into. Once they were closed they really did provide quite a nice tight seal so I never had any problem with contact lens solution seeping out. This was great as it meant I could carry these in my bag without having to worry about a wet bag and also meant that they kept my lenses nice and moist and that they never dried out. 

I found it quite easy to get the lenses out of the case once you had stored them in there. I just used my index finger and scooped them out and because there were ridges in the lens well it meant you could use this to help you. 

You can pick up these cases sometimes when you bought a bottle of contact solution for free or they were a couple of pounds on their own and are a contact lens case I recommend.