Karter Scientific 500ml Wide Neck Glass Round Media Storage Bottles with GL45 Screw Cap, Borosilicate Glass, 251M5 (Pack of 6)

Does not have pouring rings which is very important, a little disappointed.

Everything you want for a bottle that could potentially hold harsh chemicals is here. The tops screw on tight and are sealed perfectly when closed, no leaks whatsoever and they are air tight. They can pour liquids very nicely without the liquid going everywhere even though there is no "spout" or anything like a beaker would have, not sure how but they pour as well as a beaker or better with no liquid running down the side or going where you don't want it. The borosilicate glass is thick and will withstand any chemical you throw at it (except hydrofluoric acid obviously, don't use that in glass) as well as withstanding temperatures normal glass will not. I could see a lot of uses for these outside of holding liquid chemicals that need a leak proof borosilicate bottle, maybe moonshiners might like them (probably the larger sized version of these same bottles, which I also bought and am also very happy with) or for the rest of us non moonshiners, maybe holding or mixing other beverages as you can shake these without fear of spilling. Any liquid you need to hold except hydrofluoric acid (sorry Walter White) these will do great and they come in whatever size you could want.

Great if you're looking for borosilicate glass chips. Not so much if you want borosilicate bottles.

Estas botellas de medio son de excelente calidad y se ven muy bien. Las uso para almacenar soluciones en mi laboratorio.

Excelente calidad pero bastante caro por pagar el envío en lugar de ir a una tienda física donde solo cuestan 30 pesos cada uno.

excelente producto llego a tiempo