Feathers are best stored in a ph neutral environment, such as a shoe box or plastic container or ziplock bag. The box need not be airtight, but if not, you should consider using some moth balls, cedar chips, or scented dryer sheets to deter pests that may make a home in your feathers and ultimately destroy them. Avoid storing feathers in places of excessive humidity. Pack individual feathers flat to avoid wrinkles and bunching. Fancy boas, on the other hand, should ideally be hung or stored in a large box to avoid crushing.