United Scientific™ UniSafe™ Laboratory Grade Wide Mouth LDPE Vented Chemical Wash Bottle, Isopropanol, 500mL (16oz), 4-Color, Pack of 6

Product shipped very quickly, and is good quality. I was very happy to find these on amazon as they're hard to find pre-labelled in NZ. Side note, I was disappointed when I went to download the VAT invoice and they do not have one available, as this was a business purchase.

I have some of these for acetone and had a minor issue with them for acetone (they would drip after use), but thought that issue wouldn't be nearly as much of a problem with isopropanol. However that issue doesn't even seem to be affecting these nearly as much when used with isopropanol. Still there are some nuances to know about these bottles. While I will go into details about the nuances, I don't really personally consider them cons, or cons enough to warrant a star when used with isopropanol. Still, feel free to make up your own mind. LDPE bottles should hold up indefinitely to isopropanol. I used a cotton swab soaked in isopropanol to test the ink that is printed on them, even rubbing at it pretty hard, and the ink stayed completely stable. So it withstands the isopropanol very well. There are a couple cosmetic imperfections in the printing on a couple of my bottles. These bottles have a safety vent, which is a small hole in the feed tube. This allows pressure to equalize, so that changes in ambient temperature and barometric pressure don't draw liquid up and out of the tube. This has a side effect of the stream sputtering. As the venting is there to keep it from spilling all over the place while stored, I personally consider this a neutral thing. The tube itself is a little thick, so when the bottle is released, air getting drawn back into the tube does not completely suck all the alcohol back into the bottle. This results in some being left in the tube, where it can potentially drip back out. While I saw this happening with acetone, these bottles filled with isopropanol have not dripped- perhaps the surface tension is different or something. The liquid is there in the tube, but it seems to stay put, unlike the acetone. (NOTE: Any alcohol left in the tube has bypassed the safety vent, and CAN drip out from temperature or pressure changes over time. I have been able to force it out of the tube just by heating the bottle with my hand, which is easy to accidentally do.) Therefore, I recommend that immediately after use, give the bottle a couple very small, light squeezes to force all the alcohol out of the tube. It's a pretty easy habit to get into, and is a very minor inconvenience at worst. I have uploaded a video which shows the sputtering that you should expect with the vent. That very last little spurt in the video is me giving the bottle a light squeeze to clear the tube, so you can see how much alcohol was still left in the tube.

QC on the nozzles is not what it should be. The stream is not straight, sprays to the sides a bit and bubbles. The rest of the bottle and nozzle are good quality. The bottles squeeze easily as expected. I can use these for general cleaning where I'm not worried about overspray or splatter.

These are high-quality, durable bottles that are permanently marked for the product they contain - in this case, isopropanol. In the past, I've used hand-labeled bottles, but that always seems to be a less than ideal solution given that it's sometimes easy for the labels to rub or fade, and relevant safety information isn't available. These bottles solve those problems, displaying the name of the chemical (isopropanol) and a HMIS diamond permanently on the bottle. While it may also pose a problem when dispensing, the bottle is also vented to prevent a buildup of pressure due to solvent evaporation. This means the dispensing stream may occasionally 'sputter' but it prevents potentially dangerous pressure buildup. I am a maker who does a lot of 3D printing... and I use isopropanol regularly in the process. These bottles have been a great improvement for safe use of isopropanol.

I did not buy these for lab alcohol. I use these squeeze bottles for watering succulents, which need small amounts deposited directly on the substrate. If you squirt or water succulents on their leaves it can damage the farina (that dusty looking patina on succulent leaves). If you damage the farina it doesn't come back so it's best to use a squeeze bottle and water directly on the soil. These squeeze bottles hold a lot of water and the spout is very small so it's easy to control the amount of water. Great product for my use!

This set of 6 pack of isopropanol bottles work well. We will be using in our microbiology lab. I like the fact that the nozzle dispenser tip is fine point tip. You can direct the stream exactly where needed, and doesn't spray out too much all at once. If you do want a bigger stream, you can snip the tip slightly to make a bigger opening. But for our uses, its perfect small tip and stream. We use to spray IPA for cleaning surfaces, hoods, and benches in our lab. It works well. I also like that the bottle is slightly opaque, because we write/tape the date it was made and the date it expires on the bottle (good lab practice).

I was really into these lab bottle, until I put some liquid in one of them and started to squeeze the bottle. The connector between the straw and the lid was leaking, and produced a Venturi effect bringing a ton of air into the stream when I was looking for nice clean laminar flow. Very disappointing. Otherwise bottle is nice, straw is nice, combo is week. Now this is a design issue, because they wanted gases to be able to vent from the bottle.

I am truly disappointed with these United Scientific™ UniSafe™ Laboratory Grade Wide Mouth LDPE Vented Chemical Wash Bottles. Check out my attached short video, and you will see exactly why I am not happy. Summary: Overall, I think these chemical wash bottles are only average, at best. I rate them 3 STARS. I hope you found my review [and attached video] helpful.