Autoclavable Polypropylene Centrifuge Tubes, Volume 50ml, White Printed Graduated Marks from 5ml to 50ml, Assembled Leak-Proof Screw Cap, Gamma Sterile, 25pcs/Bag

For scientists battling the forces of gravity in the centrifuge ring, finding reliable tubes can be as crucial as a trusty lab coat. Enter the VISOSCI Autoclavable Polypropylene Centrifuge Tubes (50ml), promising leak-proof performance, sturdy construction, and convenient features. But do these tubes truly spin their way to lab glory, or are they destined for the dreaded broken-sample bin? Let's dissect their molecular makeup and see if they deserve a five-star standing ovation!Spin-tastic Strength: These tubes boast an impressive 12,000 xg centrifugal force resistance, meaning they can withstand even the most rigorous rotations without faltering. No more sample-splattering mishaps or centrifuge-induced anxiety!Leakproof Legends: The assembled screw caps create a watertight seal, ensuring your precious samples stay put even during high-speed spins. No more leaks, drips, or centrifuge-induced panic attacks!Sterile Squad: These tubes arrive gamma-sterilized, ready to join the fight against contamination right out of the bag. Convenience and sterility, hand in hand!Graduation Celebration: The clearly visible white printed graduations (from 5ml to 50ml) make volume measurement a breeze. No more squinting at cryptic markings or fumbling with imprecise tools.Writing Wonderland: The large white writing area on the tube wall provides ample space for labeling your samples. Organization and clarity, united!Polypropylene Posse: The durable polypropylene construction makes these tubes resistant to chemicals and temperatures, ensuring they're tough enough for even the most demanding experiments.Value Vault: At $14.99 for a pack of 25, these tubes offer exceptional value. Quality doesn't have to break the bank!The Verdict:The VISOSCI Autoclavable Polypropylene Centrifuge Tubes (50ml) are centrifuge champions! They tick all the boxes: leakproof, strong, sterile, convenient, and affordable. Whether you're a seasoned scientist or a lab newbie, these tubes will be your trusty companions in the spin cycle of experimentation.Rating: 5 out of 5 stars (a shining example of centrifuge tube excellence!)If you're searching for reliable, convenient, and affordable centrifuge tubes that won't let you down, the VISOSCI 50ml tubes are definitely worth adding to your lab bench arsenal. They'll have your samples spinning with confidence and your research reaching new heights!

As a scientist, I am very familiar with these types of tubes and the sister 50 mL versions. These tubes are typically high quality, non-leak, and excellent for measuring small volumes (if you are using the metric system/milliliters (mL)). As a reference point, 1 oz is approximately equal to 28 mL, so these, at 15 mL, are roughly 1/2 oz of volume. I use these types of tubes (especially the 50 mL version) for a lot of different purposes, not just holding liquids. They hold many different small items, like tiny hardware, sewing needles, etc. I've never used them for foodstuffs nor cosmetics because I am so used to using them in the lab, it would just seem wrong to me (and I do not know if they are made of a food safe plastic). But I have used them for animal feed/supplements and ingredients for making them (rabbits). This plastic is NOT brittle (they are used in centrifuges in research laboratories) so there is a tiny bit of flex, but it IS possible to break them. I've drilled into them and sawed them with power tools and occasionally had one crack or shatter while doing this, which is outside of the realm of marketed use, so just be careful when you come up with creative ideas for their use. One thing of note, these tubes are designed with a pointed (not flat) bottom. This is intentional, I think to make them perform better in the high forces of centrifugation. However, this means that they will not stand up on their own except on the cap. Research labs typically have holders to stand them up for loading/unloading of liquids (which I'm sure can be purchased privately) or you can drill holes into a piece of wood, but you should be aware of this because it isn't something that folks typically consider until they go to fill them and have nothing to hold them on their workbench or counter. A good, long lasting, tried-and-true product if you have a feasible use for them.

I am a retired scientist and have set up a lab to teach my grandkids science. We enjoy our time in my basement lab. I ordered these so we can grow cultures in them. So far they are working great for our layman's needs. My only concern was the caps staying on tight as kids aren't always careful and I don't want any growth media to splash on them. So far we have not experienced any issues with the lids. These are nice 50 ml centrifuge tubes. I do have a small centrifuge but we haven't needed to use the tubes in the centrifuge yet. But these are sturdy and I feel just as good as the ones I used during my career.

These are very well made and you get a lot for the price. The lids are very secure and they do not leak at all. They hold up very well to the centrifuge. I love that the markings on them are simply stamped on as those can be hard to read and usually end up rubbing off over time. These were an excellent deal.

VISOSCI Autoclavable Polypropylene Centrifuge Tubes, Volume 15ml, White Printed Graduated Marks from 1.5ml to 14ml, Assembled Leak-Proof Screw Cap, Gamma Sterile, 50pcs/Bag100% happy with these centrifuge tubes, exactly as described. They're leakproof when easily hand-tightened, are nice and sturdy, of thick plastic, and have very easy-to-read printed graduated markings. The printed lines are nice an thin for accurate readings, and the numbers are clear and easy to read, even without my readers. The printed marks are so much more functional that your typical stamped markings, which are a huge strain on the eyes. The white patch can be marked with sharpie or pencil.I'm using these for art supplies, inks and dyes, as well as dry craft supplies, not in a lab, so I can't speak to the specific lab claims. But I've used several types and brands, and these are my favorites by far, reliable and rugged.