Where they get you with the 1 carto = 1 pack of cigarettes is in the nicotine content. If you look at advertisements for something like this, most of them don't say "Will last as long" as a 1 pack. They just say equal to. It's a marketing scheme, tho technically they aren't lying, it's still deceiving to the customer. If you get tired of filling cartos, I know I did, try going with a carto tank. I have had good luck with the Smoketech DCC Tanks. The 6ml version will last me about 3 days before I need to refill.