BIPEE Graduated Transparent Lab 🧪 Experiment: Precise Measurement and Visibility Combined Review

Very happy with it. Difficult to find 10ml. The price is a bit high, but oh well. UPDATE 12/4/17: At least one of them has stopped working (I haven't used all of them, only about 4). Doesn't pull or hold water! That's ALL he has to do! The rest are still working. Minus one star. And as another reviewer mentioned, it doesn't hold 10ml, which I don't mind much but someone else might.

I received these pipettes for dispensing concentrated cleaning chemicals (such as Unger Pro window cleaning solution and Simple Green D Pro 3) for dilution in 16 oz spray bottles. I checked the calibration by drawing water from a graduated cylinder and the pipettes drew 30% less water than expected. This is unacceptable even for a cheap transfer pipette, and for my purposes the solution turned out to be more dilute than expected.

I bought these for pouring liquids from Snow Cone concentrate bottles. I had to throw away a few of these because the bulbs broke so I ended up having to order them again. The bottle necks are too narrow to use a traditional washer. I've seen a few glass bastings at Revain that would probably meet my needs and last a lot longer than those plastic pipettes, but I've seen too many reviews complaining about the bastings breaking.