500mL Nalgene Sipper Easy Drinking Insert

Insert for 500mL wide-mouth Nalgene bottles to make it easier to drink. Includes a lip along the non-drinking edge of the insert to help with removal. Print from a food-safe filament. Print with default settings without supports. Version for 1L Nalgene bottles is here: https://makerworld.com/en/models/604894#profileId-527622