Hey members of the aternos team 
Could you please add the mod Portal gels
link curseforge.com/minecraft/mc-mods/portal-gels
Its a mod that adds the gels from portal into minecraft,
Although It only has 738 downloads 
This is its description and contents:
Blue gel
Orange gel
Purple gel
Blue gel dropper
Orange gel dropper
Blue gel add jump boost effect
Orange gel add speed effect
Purple gel add sticky effect and you can walk in walls.
Dropers spawn this gels. Orange spawn orange gel and blue spawn blue gel.
Please add this mod 