When placing filament boxes on shelves for storage, these pulls can be slipped into one of the sides on top or bottom (or if horizontal) and used as pulls to aid in grabbing the box off the shelf with one hand.

• No supports needed, fully printable in place.
• Available as a 1, 3, or 10 pack print in profiles.
• Can be placed on ‘top’ or ‘bottom’ edge depending upon shelf-height and comfort
• Can be used as filament swatches for easy identification on boxes.
• Built-In teeth to grab the corrugated cardboard
• Use one as a reusable tool or many to have each box ready to grab
• Compatible with any box with a creased-side facing out.
• Thickness tuned for ‘E-Flute’ corrugate, up to ‘C-Flute’ thickness.
• For corrugate thicker than C flute, simply up-scale the model in your slicer.

Update: 

At a user's request, I've added a version that can be used with boxes that have their labels on the ‘top’ or ‘bottom’ edges to keep them visible. See ‘Straight Edge Version’ in Print Profiles