For many years I’ve tried to dissuade my married daughters from giving themed m’shalach manos but a “necteger tag”, no one paid any attention to me.
No exaggeration, we receive and give scores of m’shalach manos and at least half of those we receive are cleverly themed. We also receive many pre-packaged types sold by “Tzadaka” organizations, but while the contents and containers are very fancy; I enjoy the home baked/cooked items far more.
M’shalach manos were intended to not, be m’ayin, look carefully, into the kitchen of the sender but to enhance fellowship of friends and neighbors. It is a good idea though to indicate whether the “mezonos” items are yoshan.
Someone once asked my Rav in shiur what he thought of themed m’shalach manos. He responded that the question was once posed to Rav Soloveitchik by a talmud, whether themed m’shalach manos were assur to send. Rav Soloveitchik answered that themed m’shalach manos were stupid and anything stupid is assur.