Deck Shell - Red/Black - Rules of Play says:

The new and improved Dragon Shield Deck Shell is a sturdy flip-case with a deep cut out. The lid won't pop open unexpectadly and can be set under the box so it stays open, giving a minimal footprint and easy access to cards. The Deck Shell fits inside large Nest boxes and Magic Carpets. Cube Shells will fit inside the Deck Shell. Each Deck Shell comes with a divider and has a writing field on top for personalization. The Deck Shell will fit 100 single sleeved cards or 80 sealable double-sleeved cards.