Took to my Boots No 7 Intense Protect and Perfect Serum with a hammer this morning. I couldn't quite believe I'd got through that whole dispenser in such a short time. And what do you know? I hadn't. Once I'd got through the complicated spring mechanism there's a hard plastic tube inside the glass with stops about one third of the way down. That big container holds very little and half of that doesn't come out with the nozzle.
Come on Boots, this is wasteful and deceitful - sort yourselves out.