These are the big cartomizers by Smoktech. They hold 5ml and are as wide as an ego battery. Many people love them and they are usually about $3.00 each. VaporDojo has them for 99 cents. Load up. I just bought 10. They are great for portability. Pop it on a twist and and your good to go. WHERE: http://www.vapedojo.com 99 cents (update 9:39pm est) - told 1 per customer.