No, hot or warm liquids are not recommended to be used in the Orgain Blender Bottles (also known as shaker cups). Hot or warm liquids may build up pressure within the bottle and cause the flip cap to open unexpectedly and spray contents.
Some ingredients such as pancake batter may also build up pressure within the bottle. When mixing these types of ingredients, users should hold a finger over the flip cap while shaking and use caution when opening the flip cap. Always point the spout away from face when opening the flip cap.
For more information or questions about BlenderBottle®, please follow the link here.