A little trial and error.
The tubes look like the picture.  They’re a nice size and cute.  They come with the stoppers to clean excess gloss when pulling the wand out of the tube.  To fill, we cut the tip off of a pipette and attached it to the syringe.  That allowed us to fill from the bottom of the tube.  Without the pipette, just using the syringe, there was a lot of air left in the bottom of the tube. Or a lot of air bubbles.  It became very messy.  After figuring out the pipette attachment and the stopper.  It was easy peasy!
Rating: 4 stars