17 Cup Airtight Container from Snapware.  I have this container and use it as my primary DME storage container.  Check out my Hands on Review.  Holds about 5 lbs of grain or about 4.5 lbs of DME.

Part of the Snapware MODS Rectangles series.  100-Percent airtight and 100-percent water tight.  Easy to open and close latches that work together with the silicone seal to keep foods fresh and to prevent liquids from leaking.

Update: Since this post was published the price, availability or promotion has changed.  Check the product page for current description, price and availability.  Also: Today’s Deals on Amazon

Snapware MODS Medium Rectangle Storage Container 17 Cups

Also available in a two pack…
Snapware MODS Medium Rectangle Storage Container 17 Cups (Set Of 2)

Also: Storage Options – Base Grain, Specialty Grain and DME