Newspaper but I love the look of substrate like Repti-bark. Because I don't need it for proper husbandry, though, I can't justify $25/bag with even just 9 snakes. Bowls are a mix of things. Aradia has a tip-proof cat bowl, Angelina has a ceramic ramekin, the snakes >500 grams have small, flat mason jars and the other two <1000 gram ones have tip-proof dog bowls from petco.