龟苓膏 Guīlínggāo is an acquired taste.
It looks like a jelly made out of squid ink. It tastes like bitter Chinese medicine, even when you drown it with the sweet syrup shops provide.
The only consolation is that it’s good for your health. In Chinese tradiotional medicine speak: It is good for “cooling” the body.
I didn’t like Guīlínggāo when I was a kid. It was too bitter. But now that I’ve grown up, I quite enjoy the bitterness and its contrast with the honey-sweet syrup.
If you are ever in Singapore, Malaysia, Hong Kong, Taiwan and China, try a bowl. Go on.