This flat lid has a cross-cut straw slot and fits 9oz -16oz size tumblers. Manufactured entirely from 100% post-consumer recycled PET (r-PET). Despite being made from recycled materials these lids have excellent transparency, flexibility and strength. Manufactured entirely from 100% post-consumer recycled PET (r-PET). All of the 100% r-PET range uses no new (virgin) plastic at all, is fully and easily recyclable after use and has a lower carbon footprint than products made from virgin plastic.