Twilio has introduced a new feature to control messaging costs for its SMS users by setting a maximum price for messages, allowing businesses to avoid high or unpredictable costs when sending messages internationally. This feature enables users to set a limit on the total cost of a message and prevents Twilio from sending messages that exceed this limit. The feature is straightforward to add and can be tested using a simple POST request to the API. By setting a maximum price, businesses can better manage their messaging expenses and ensure they are not overspending on international SMS services.