The case of the sideways bento and the food within

What do people use to separate the small amounts of food items that may be somewhat "juicy" for lack of a better word? I drained some mandarin oranges for me and the kids yesterday and put them in silicone cups or divided sections of my boxes and still the kids bread ended up soggy in the other compartments. Are there small short (silicone cup size?) boxes that have lids out there? I haven't found anything small enough that will permit me to close the bento box after I put the little box in it.