"Russian Nozzles" star star star star_border star_border I have tried them but am not sure how robust the nozzles are due to being plastic. Although my first and only attempt was a disaster it was probably the stiffness of the icing that said I am concerned that if it is stiffer I will not be able to squeeze the icing out. Will try again though Marilyn - 22 July 2020 support_agent A note from the team Thank you for placing your review. The nozzles are made from Tritan which makes them extremely strong. For best results we recommend using an Italian meringue or a stiff American-style buttercream recipe with these nozzles.