I have been using Zinsser Polyvials V (HDPE) since 1988 (never bought them in the US though). They last at least 3 decades without degradation, seal tightly and are pretty diffusion tight. I still reuse mine from 1988 and the 1990s. Only occasionally they degraded with liquid alcohol in, depending on the specimens and which stuff leaked out of them. They keep moisture in (beetles in alcohol-soaked toilet paper) for three decades easily:
Made in Germany is still good sometimes.



Dr. Frank-Thorsten Krell

Senior Curator of Entomology, Editor-in-Chief
Commissioner and Councillor, International Commission on Zoological Nomenclature
Department of Zoology
Denver Museum of Nature & Science
2001 Colorado Blvd
Denver, Colorado 80205-5798, U.S.A.
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Phone 303.370.8244
Fax 303.331.6492

From: Entomological Collections Network Listserve [mailto:[log in to unmask]] On Behalf Of Peter T Oboyski
Sent: Friday, June 2, 2017 11:57 AM
To: [log in to unmask]
Subject: Field vial recommendations

I am looking for a source of plastic field vials for 95% EtOH preserved specimens. The 2mL variety are easy enough to find. But I need some larger sizes (5, 10, 25, 30 mL) that seal well for field and traveling. I am aware of falcon tubes. Any other recommendations?
Peter T Oboyski, PhD
Collections Manager & Senior Museum Scientist
Essig Museum of Entomology
1170 Valley Life Science Building
University of California, Berkeley

mailing address:
1101 VLSB, #4780
Berkeley, CA 94720<><>

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510.643.0804 (work phone)
510.847.0360 (cell phone)