Guild Wars 2

I remember that I read that the bottles are replaced by immediate WEXP, but today I watched my WEXP while opening the chest, and I did not got anything, neither a bottle nor immediate WEXP.

you get a 20 min xp booster usable in all forms of the game, so as long as you’re active you can get a heck of a lot more wxp using that than you did with the liquid wxp.
I tend to save my chests and use them for the xp booster to help my spvp reward track.