Price is primarily driven by material thickness, battery life, and branding options. Basic single-color battery-operated models are the most economical, while rechargeable RGB models with Bluetooth speaker integration command a premium. For B2B buyers, bulk discounts typically start at 500 units, where unit prices can drop by 20-35%. Always factor in the cost of custom logo printing (silk screen or laser engraving), which adds a small margin but significantly increases brand value for promotional use.