HBO Max is a subscription video-on-demand streaming service that combines all of HBO Max with Discovery+ favorites. To sign in to your HBO Max account, you can open the app and tap the profile icon, then enter your account email and password.

Regarding the quality of the service, some users have criticized the user interface, the recommendation algorithm, and the lack of value for the price. However, others have found it to be a good service and have appreciated the combination of HBO Max and Discovery+ .

In terms of ingredients or materials, HBO Max is not a product that contains any ingredients or materials. However, there is a docuseries available on HBO Max called "Not So Pretty" that investigates the potential toxicity of chemicals in beauty products. The series looks at the use of toxic chemicals in beauty products and the lack of regulation in the industry. While some experts have praised the series for raising awareness about the issue, others have criticized it for being fearmongering and not covering all the harmful ingredients and their origins.

Overall, HBO Max is a streaming service that provides access to a variety of content, including TV shows and movies, and does not contain any ingredients or materials.