These Square Glass Concentrate Jars are a nice alternative to the traditional round concentrate containers. The base of the square concentrate jar is made of glass and it comes with a plastic lid and liner. Our square glass concentrate containers come in clear, black, or white glass and with caps in black or white.,, • 250 jars per box, • Base: BLACK Glass, • Cap: BLACK Plastic Push Down & Turn with Liner, • Dimensions: 35mm x 35mm, • Height: 22mm, • Size: 5ml, • Smooth Inner Walls, • Leak-Proof