Hatching Cup with Access Plug & White Aspen Excelsior (Mildew-Resistant Wood Wool) Create the ideal environment for hatching praying mantis eggs with this ready-to-use hatching cup. Designed for convenience and optimal humidity control, this cup features an access plug for easy misting and inspection. The included white aspen excelsior—naturally mildew-resistant wood wool—provides a safe and secure perch for delicate mantis nymphs, supporting their development from the moment they emerge. Simply mist with clean water to maintain the perfect humidity level without the risk of mold or mildew. Key Features: Pre-filled with white aspen excelsior (mildew-resistant) Access plug for easy humidity control Safe, secure, and clean environment for hatching mantis eggs Ideal perch material for newly hatched mantis nymphs Reusable and easy to maintain Perfect for breeders, hobbyists, and educational use.design or keep it blank for a classic look you can print on.