It depends on the precision and accuracy you require. Volumetric flasks are "calibrated" to a particular volume, whereas the markings  on an Eppendorf tube are really printed for our convenience. They are _probably_ consistent since they are machine-made, but they make no guarantee about accuracy or precision.

I also agree with Jack Silver, although, if still want to do it, you can try with properly calibrated automatic pipettes, being aware of the temperature of the room and liquids.

I presume that you would prefer to prepare smaller volumes.  This can be done accurately using calibrated pipettes.  Test it for yourself

I also agree with Jack Silver. Eppendorf tubes are not meant to prepare standard solutions. If your aim is to prepare smaller concentrations,then use a 1.0mL  calibrated pipette as suggested by Paul Milham( thiis can measure a minimum of 0.01mL )and use a 5mL standard flask Or carefully carry out serial dilutions from a well prepared stock.

If you are interested precision and accuracy definitely have to use volumetric flasks, type A, you can check the calibration of them or buy certificates.

But if your interest is more qualitative in eppendorf you can do, as long as the analyte of your interest not adsborbido by plastic