Zip disks should work for about 30 years, and quality CD-Rs have a life expectancy of 75 to 100 years. CD-Rs in my opinion are your best shot right now. These shelf lives are only estimates most computer media haven't been around long enough to know for sure. Manufacturers use environmental testing chambers to simulate the aging process and gauge the effects of temperature, humidity and other factors. The problem is delamination a breakdown of the adhesives that bind the disk.
Every company has multiple lines of products buy the premium quality.
I wouldn't buy from weird companies. Even if the information on your removable media remains intact, it will be useless if hardware to read that disk isn't available down the road. Companies can stop making particular models of drives, or can go out of business outright. For example, in 1998, Syquest, once the leading manufacturer of magnetic removable-media drives, filed for bankruptcy, creating headaches for users who needed repairs or additional media. To prevent committing priceless data to an obsolete medium, it's wise to choose a storage option that doesn't lock you in to one company for instance, CD-R or other optical disks.