From a safety perspective, wires are not food grade and should not be directly inserted into a cake. Metals are made up of elements which have the potentials of leaching into the cake and having serious health implications for the final consumer. Hence the need for the wires to have an indirect contact by encasing it using – posy picks, straws etc. Floral tapes are also not food grade, hence should not come in direct contact with your cake.
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