The clue is 'broadcaster'. Find the clue in the words. 

• Ceramic
• 11 oz mug dimensions: 3.8″ (9.6 cm) in height, 3.2″ (8.2 cm) in diameter
• 15 oz mug dimensions: 4.7″ (11.9 cm) in height, 3.3″ (8.5 cm) in diameter
• 20 oz mug dimensions: 4.3″ (10.9 cm) in height, 3.7″ (9.3 cm) in diameter
• Dishwasher and microwave safe
• Blank product sourced from China