EISCODropping Bottle, 60ml (2oz) - Amber Borosilicate 3.3 Glass - Eye Dropper Pipette and Dust Proof Rubber Bulb - Octagonal, Non-screw Top Labs

I ordered the clear and the amber bottles to use for medicinal syrups. The secure package was shipped quickly. Both bottles are quality glass and the bulbs are perfect. I've used and washed them multiple times. No issues. I love Eisco products. In addition to these bottles, I have quite a few beakers. Never disappointed.

I love these bottles. The dropper bulbs are actually big enough that you can get a full dropper at at time. And the glass dropper and amber bottle are great for compatibility. The plastic top seems to be nicely made and fits the bottle perfectly.The only problem is that if you use DMSO in it, it attacks the rubber bulb, partially dissolving the rubber into the contents! That’s why DMSO is usually sold with a silicone (typically white in color) dropper bulb. I really, really wish the seller sold a version with a silicone bulb.I have not had any issues with my other essential oils and the bulb - But I suspect that lavender essential oil might likewise not be compatible with the rubber bulb as it is also a powerful solvent.

The bottle is fine it holds liquids like any other glass media, the stopper is prone to dry rot and splitting. Recommend the manufacturer switch to a silicone alternative rather than natural latex