Define the use
List the contents, approximate weight and expected use. A promotional handout and an everyday carry bag may call for different constructions.
Discuss construction
Material, handle length, seams and dimensions all contribute to usability. Request a specific sample when feel or construction is important.
Check decoration
A surface texture can affect fine artwork. Confirm the usable print area and method before finalising the layout.
Use precise claims
Do not assume a material is recycled, certified or environmentally preferable from appearance alone. Ask for evidence for any claim you intend to publish.