We use 2 dram (0.25 oz) Sarstedt plastic tubes with o-ring screw cap (57x16.5).  Fantastic for field work… never had an issue with them over lots and lots of collecting trips.

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Robert W. Sites, Professor
Subject Editor - Zootaxa
Enns Entomology Museum
University of Missouri
Columbia, MO  65211
USA
(573) 882-2345
(573) 882-1469 (fax)
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http://www.museum.insecta.missouri.edu
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On Jun 2, 2017, at 12:56 PM, Peter T Oboyski <[log in to unmask]> wrote:

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?

Pete
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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

http://nature.berkeley.edu/~poboyski/
http://essig.berkeley.edu

[log in to unmask]
510.643.0804 (work phone)
510.847.0360 (cell phone)
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