Mostly people will use those green Coleman camper tanks like this one.
As for general care, don't forget to use ultra light weight silicone oil in your tanks. If you buy the AI Adapter Gun Gas Kit it will come with a bottle that should last you until the second coming of christ. I have one that Ive been using for about 2 years and its only half way through. You can also buy refills from AI. Don't forget to clean and lube the rest of your GBB as well. Keeping in my you use a different kind of silicone oil for lubing the guts of the GBB. I use Amsoil brand Silicone Lubricant Spray. You don't have to use the same, but just keep in mind, do NOT use any spray that contains petroleum distillates. If you google "GBB Maintenance " you should find any questions you have about proper GBB care.