A system consisting of a pot and a series of strainers, the series of strainers configured to allow liquids and gasses to move freely within the pot while containing foodstuffs. The strainers are disposed such that they disrupt the formation of bubbles that leads to boilover while minimizing the loss of volume within the pot. The system of strainers may look like an inverted dome coupled with a dome, allowing foods and liquids to expand within the pot without allowing bubbles to pile up and boilover. The system of strainers may be a single piece permanently coupled or may be one or more strainers removably coupled by a user. At least one of the strainers may include at least one grip. The system of strainers may include means by which they can be specifically positioned within the pot. The system may include at least one lid.