A solid bio-bag! No bio-bag is perfect, but these come close for the price point! The Double ziplock seal keeps any errant fluids in well and the absorbent pad gels up to hold more than even a full 10ml tube of fluid in case of accidents. Document Pouch holds up to a half dozen pages folded over without any issue as well. Opening is easy too, tear zone on the bag is smooth and comes off cleanly and more easily than other, even more expensive bio bag options: No more new accessioners accidentally flinging tubes across the lab!