2pcs of Narrow Mouth Glass Erlenmeyer Flasks, Vol.1000ml, 3.3 Borocilicate with Printed Graduation, LVC005

The inner diameter of the mouth of this set is inconsistent to the point that I've lost a 0(?) stopper INTO one of these flasks. The only way to recover this stopper is by breaking the flask. The only way to recover the flak is to run acid and dissolute the rubber stopper to a disgusting, pour-able point.I measured the following with a micrometer (of those not in use)"29.9x29.5x30.7x [STOPPER EATER!!]28.7x30.9XEven if you give these measurements a +/-1mm, I think you'll find that the bridge between 28mm and 30 is to large.Glass seems thick and strong enough, although in white light, it seems to have a tint that would suggest a possible annealing issue. This I cannot measure until one breaks or I need a 0 stopper.

The only reason I haven't given these flasks 5 starts instead of 4 is because I wish they had some type of caps you could then seal the tops of the flasks with like snap on Lids or threaded screw on Lids so they could be used in a pressure cooker and have the contents protected from getting any added water into the flasks. I'm going to try using layers of foil or possibly another type of material to cover the tops of the flasks during sterilization while in the pressure cooker but having a factory tight seal from some type of lid would have been a nice option to have if it's needed. Other than that reason, these flasks are made with great craftsmanship and quality material.

I was reluctant to buy Labvida beakers and flasks because they were so much less expensive than the other products. I thought maybe they would be of a lesser quality, and therefore not worth my while. However, I am SO pleased with these low form beakers and narrow mouth flasks! I teach Special Education middle school students and we do science experiments together several times every week. I finally got tired of using random coffee mugs, bowls and plastic water bottles, so I decided to buy the real thing. I am so happy I did! These beakers and flasks have survived boiling hot water baths, expanding chemical and gaseous mixtures and the indelicate hands of many happy young people! I hope to use them for years to come and will definitely being buying more in the future! Thank you so much for providing a sturdy, functional and affordable product!

I was reluctant to buy Labvida beakers and flasks because they were so much less expensive than the other products. I thought maybe they would be of a lesser quality, and therefore not worth my while. However, I am SO pleased with these low form beakers and narrow mouth flasks! I teach Special Education middle school students and we do science experiments together several times every week. I finally got tired of using random coffee mugs, bowls and plastic water bottles, so I decided to buy the real thing. I am so happy I did! These beakers and flasks have survived boiling hot water baths, expanding chemical and gaseous mixtures and the indelicate hands of many happy young people! I hope to use them for years to come and will definitely being buying more in the future! Thank you so much for providing a sturdy, functional and affordable product!

Perfect size and lip to serve as inexpensive, (slightly nerdy) wine decanters!

UPDATE: they’ve done great through the dishwasher. Just an added bonus for my use case.We were looking for flasks to function as juice carafes for a mimosa station and these were the perfect fit! They pour nicely and the opening is just a little wider than any wine bottle stopper, but we used some whiskey corks and they fit happily. Not they’re intended primary use... but exactly what we were looking for. Easy to clean and durable. They came packaged well too.

The beakers worked perfectly for our first experiment. However when placing the beakers in a plastic basket, to bring to the sink for cleaning, the beakers bumped each other and one broke the whole side of the beaker. I knew they were fragile, and even with careful movements one still broke.

I do yeast starters in mason jars and thought I'd give these a try. I do like them and the stir bar does spin easier but overall I would say there are pros and cons compared to me continuing with mason jars. Good quality product.

I haven't used these yet, but they are beautiful, clear, and thick-walled. Arrived on time, well-packaged.

Great product

Excelente compra! Los utilicé para decoración

Product is good except that 2 out of 4 was broken upon delivery.