The one thing I know to avoid combining with orange juice is strongly smoked salt fish. It changes the taste of orange juice to bitter.

Then why do I love salad with orange sections and smoked herring... possibly fennel too.

I am so delighted by the responses this thread has generated

Rooibos tea works on some cereals. You can think of that as a sort of North American hipster version of chazuke.

Of course cookies can be dunked in milk. Once on a plane, sometime around her first birthday IIRC, my daughter tried dunking Biscoff in Diet Coke. I was so proud of her because clearly she was a culinary genius! Until I tried it.

I LOVE orange juice on Wheat Chex. So, I don't think this warning applies to me.