It's a glass jar, inside a silicone sleeve (keep sun out and reduce likeyhood of breakages I guess) with a metal insert seal and a recycled plastic lid
They are selling them for £20 on the pharmacy site, not sure they are worth that but nice to get a free one for sure.
Apparently I'll receive an email to sign-up to their rewards scheme in a week or two - I'll share here when I get that as it doesn't appear to be the reward scheme linked on MedBud