An assembly having a valve mechanism with applicator tip for cosmetic containers, in particular for compressible tubes, having two separate valves, one in the actuation mechanism and one at the applicator tip, with a lid-like mounting base having an external attaching element for attachment of the base in a liquid-tight manner to the bottleneck of a suitable compressible container, and having an internal attaching element which also defines a passage for a product. The internal attaching element is also an integral part of a first valve capable of sliding upwards and downwards, with the lower end of the first valve oriented to open and close the passage, while the upper end is centered inside a sleeve, wherein the sleeve receives through its top end the base of an applicator tip into its inner portion, and the external portion of the sleeve receives an overcap that surrounds the applicator tip.