Egg boxes have also been barred from schools amid worries that they could spark outbreaks of sickness.
Teachers in Ilminster, Somerset, asked: “Please do not send in any toilet rolls or old meat packaging trays as we are not able to use these.”
Similar requests have also been made by nurseries and schools in north London, Co Durham, Salisbury, Wilts, and Chorley, Lancs.
However, experts claim that teachers are wrongly quoting health and safety guidelines.
And government officials even labelled bans on loo roll tubes and egg boxes an “urban myth” almost 10 years ago.
Matt Endean, of the Consortium of Local Education Authorities for the Provision of Science Services, which promotes science in primary schools, also blasted the “perennial myth” surrounding health and safety fears.
He added that bans on cardboard items were “an unrealistic response to a minimal risk”.