Webbing inside your Insect Lore Cup of Caterpillars is completely normal. Learn more about why your caterpillar friends have webbing in their cup! The webbing you see inside your Cup of Caterpillars is actually created by the caterpillars themselves. It is a natural process that they go through as part of their developmental stage. Our best-selling Cup of Caterpillars lets kids watch 5 tiny caterpillars embark upon their remarkable journey from caterpillar to butterfly. Great for in-home and classroom learning. Learn more about Insect Lore: insectlore.com/collections/butterflies-caterpillar-refills/products/cup-of-caterpillars-shipped-live-now Stay connected with Insect Lore: Instagram: instagram.com/insectlore Facebook: facebook.com/insectlore Pinterest: pinterest.com/insectlore #InsectLore #Caterpillars #Butterflies