Spawn bottle 12 bottles with filter

These are empty mushroom substrate bottles that were used for raising stag beetles, including *Dorcus hopei binodulosus*, at home with children.
The bottles have been rinsed with water, but please understand that there may be some residue remaining.

12 bottles, 800 cc capacity.

Please be aware that these are used items and may have signs of larval chewing or filter stains. We ask for your understanding before considering a purchase.
The items will be shipped in recycled cardboard boxes.

Please note that I am currently on a work assignment away from home. Shipping will occur when I return home. Therefore, please allow some time for shipping.