Bare by Solo Eco-Forward SSPLA Paper Hot Cups offer an environmentally responsible way to take your hot beverage with you wherever you go. They are made with single-sided, polylactic acid paper & plant-based, renewable resources & meet the requirements of the SFI Chain-of-Custody standard. Cups are lined with PLA (polylactic acid), a plant-based resin, that acts as a moisture barrier to prevent leaking, replacing the petroleum-based lining typically found in paper hot cups. Rolled rim gives rigidity to the cup & ensures secure, leak-resistant lid fit. Lids that fit this cup are Dart / Solo LB3081-00007, TL38B2-0004 & TL38R2-0007 lids (sold separately). The first two lids also fit the 10 oz. size of this cup for operational efficiency.