Hey again everyone, I recently did some pixel art to sell as stickers and overall I'm pretty satisfied with what I made. However, I can say that pixeling liquid or specifically coffee for my piece was difficult and I definitely think I can improve upon it.
Here is the original, the final is unfortunately sized up as I have to do so for sticker making. Its an E-Tank from Megaman with coffee in it.

Unfortunately, I could not find any tutorials on specifically on how to pixelate drinks

and instead followed a tutorial on water and references on the coffee itself.
Can anyone give me any tips on how to do pixel art on drinks? or is there any tutorials on pixelating drinks themselves?
Thanks so much guys.