Premium Bottle Top Dispenser, 30ml Bottletop Dispenser for Laboratory Use, Accurate and Easy-to-Use with High Chemical Compatibility and Auto-Calibration

I needed an easier way to dispense 35-50mL liquid and this did the job. I have been using it for the past month or two and this dispenser has worked great. Except for the first pump and dispense, all other times the dispenser is accurate in dispensing the correct volume. Due to the air in the system the first pump does not give the desired amount. If you need to use a magnetic stirrer while dispensing the liquid it cannot suck up the last amount of liquid since the tube cannot be extended to the bottom of the bottle/flask due to the stirrer. Not a big problem since you can attach a more flexible tubing that will not interfere with the stirrer at the bottom. Overall a great buy!

Dispensing an oil 10ml at a time. I have the 2-10ml. By the 50tn vial it may have been a fraction of a ml like 1/5 1/6th more than I started but very very minimal. Almost unnoticeable. Super super great for dispensing repetitive amounts. Awesome purchase. Save me hours literally and gave me the ability to have some sort of consistent measurement without breaking my back. I recommend for this purpose. If you need for very presice small measurements, maybe a labe pipette dispenser may be more suitable but for my purposes it was great.

I use this to fill 2 ounce jars with hot melted balm 180F - works great. However, melted pot of material is deeper than the straw will reach. I can not see where I can buy another straw or an extension.

Seems well made for the price. Works great, our biochemist had no complaints,and he is very fussy. Will be buying again.

Very good quality. Very details docuementation. Good buy from us. Thank you.

Purchased for chemistry lab and after testing the unit we realized it wouldn't come apart for cleaning. If we can't clean it, it's essentially useless for us. We tested with concentrated sulfuric since that is one of our strongest acids and would be most often used with the apparatus. Even after flushing and neutralizing, the seals were damaged and the pump leaked horribly.Our initial test measurements were accurate to 10mL, though. Anything smaller was off by a few mL.

Drips constantly, does not dispense same amount every time. Waste of money!!!!

I fill 1 to 4-ounce containers with this. It is very accurate and I can fill light creams and low viscosity products with it. I can fill about 100 30 ml containers in about 30 minutes.