Sous-verre tortue et papillon (Ensemble de 4)

There is so much off-gassing from the coasters that I actually feel sick breathing it in. I will have to keep them outside before Christmas to air them out. It is a beautiful design, but I wondered if someone used a spray on them before they were sent or whether the material itself was not completely cured. Nothing like this has ever happened before. Please tell the manufacturer. Thank you.