Bottle-top Dispenser, 1-10ml, Amber Glass Bottle

I ordered two dispensers, both are are of low build quality but I suppose that's to be expected at this price point, especially for a solid glass dispenser.One dispenser though is considerably worse than the other as far as quality goes though. Poorly ground glass inside of volumetric well frequently sticks upon use, the screw-to-tighten volume selection does not actually tighten so I'll need to fabricate some sort of workaround for that so that volume dispensed doesn't flop around. All the top parts seem to be crooked as far as their placement on the bottle, and the lid itself rotates because it's attached to an adapter on top of a smaller bottle mouth. Accuracy seems to be +/- 0.5 mL for each dispenser, and the vacuum effect on liquid within seems weak so be prepared for some leakage while using.The whole things workable for my needs but I probably won't be buying from this manufacturer again.

Works perfectly, well designed!: