There is a trend going around on TikTok aptly named “underconsumption-core.” In these videos, influencers discuss how they either plan to or are actively cutting back on their spending, particularly as it pertains to fashion and beauty. For the latter category, people are going as far as starting “project pans,” where they set aside a particular number of products every month, in hopes of using them enough that they start to see the bottom of the makeup’s container. “I don’t think there’s anyone who has a ton of makeup that’s happy with the amount of product that they have,” TikToker Elysia Berman, who is on a no-buy, where she doesn’t…