Reddit reviews SEOH 10 Pack Glass Test Tubes 4-inch 13x100mm with Caps

https://www.amazon.com/SEOH-Glass-Tubes-4-inch-13x100mm/dp/B007DQGKC6

You just need to mark the 5 ml line.

I use a Santa Cruz shredder and store it in these: https://www.amazon.com/gp/product/B007DQGKC6/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

There are plastic ones too, (doob tubes) but I prefer the glass.

Just pour the shredded into tube and pour into hopper. I shake the tube before opening it to loosen the pour.

Storage container

Test tube rack

Leak proof test tubes

test tubes

You can buy the holder also it’s in the add on part.