Just bought a sample pack of the Cooljarz, I really like how they're UV light proof.
Edit, wow, that was fast shipping! I'm pretty damn pleased with the quality of these containers, especially given their reliance to sunlight, and their American construction. The gold-topped jars have an absolutely awesome seal that almost goes pop when you open them, and the Budbowls have what seems light a slightly less reassuring fit. It just feels that way, I could very well be wrong, but it's still a far better seal than most plastic screw tops. They're lightweight and recyclable, they have tiny containers for concentrates, and the one-joint holder type container is perfect for holding 1-2 days worth of ground material on the go, while being pocket friendly, and have a narrow mouth for convenient loading of bowls into MFLBs, Vaporgenies, Solo tubes, etc.. To get the broken record running again, I really love the UV protection, how I can (in theory) leave a container in bright sunlight and not worry about the contents degrading.