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Tips for Teachers: Plastic Zip-Top Bag Alternatives

You can use plastic drink cups as alternatives to the zip-top sandwich bags. Plastic cups are easier to pour and scoop, but they are less similar to expandable throat pouches of "gulper" rorqual mysticete whales.

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Exploring Our Fluid Earth, a product of the Curriculum Research & Development Group (CRDG), College of Education. University of Hawaii, 2011. This document may be freely reproduced and distributed for non-profit educational purposes.