Spawn bottle 12 bottles with filter

These are empty mushroom 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 left.

1100cc, 12 bottles

There are signs of larvae chewing and dirt on the filters, so please consider these as used items and purchase with understanding.
The items will be shipped in recycled cardboard boxes.

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