These three devices represent the FDA's evolving approach to authorized e-cigarettes. The original JUUL was authorized with minimal access-control requirements. The JUUL2 added pod authentication and one-time age verification. The Glas G2 went further with continuous biometric verification. The FDA explicitly cited the Glas G2's access-restriction technology as part of its authorization — signaling that age-verification tech is becoming a path to authorization, not just a nice-to-have.

This matters because the cost of developing and implementing this technology is significant. Most small vape brands cannot afford the R&D and PMTA filing costs. The result: the authorized market may consolidate around heavily-backed companies like JUUL Labs and Glas, while smaller brands operate in the unauthorized gray market.

For consumers, the question is whether the access-control features add genuine value or just regulatory friction. The JUUL2 strikes a middle ground — enough tech to satisfy the FDA, but not so much that daily use becomes burdensome. The Glas G2 is the regulatory gold standard but demands constant phone pairing. The original JUUL is the path of least resistance — but it's also the path with the least protection against counterfeits and unauthorized access.