What is the difference between the Carbonation Bundle CO2 exchange and the exchange without the bundle?

Carbonation Bundle CO2 Exchange - 

• Return within 90 days
• Charged £10 per unreturned cylinder
• Return Box is included with prepaid shipping label for Yodel / In Post (fits 2 cylinders)

CO2 Exchange (Without Carbonation Bundle) - 

• Return within 45 days
• Charged £10 per unreturned cylinder
• Return via Yodel / In Post