Item 1: Earbuds

• the best shape to fit in most ears
• the most comfortable and affordable rubber
• ways to ensure quality sound

Item 2: Envelope

• types of paper that are thin yet sturdy enough to not rip easily
• the best design for easy closure without extra bulk
• types of glue that could be used to secure the flap

Item 3: Charging Cable

• the most practical and popular length
• what areas need extra surrounding material for protection
• how to allow versatility to accommodate any outlets available at a given time