This simple little carrier hugs a bottle of contact lens solution, so the two are always together and easy to find at the bottom of your pack. In the past, I've relied on rubberbands and plastic baggies, but of course they tend to break and they add an extra packing step. This clip pops conveniently on and off. The colors make it easy to distinguish right from left. And it's reduced a bit more clutter from my dopkit. The price is a tad extravagant, but the case is so effective I'm done using the freebies.