Per the University Library's Patron Conduct Policy: The introduction of food and drink to Library facilities may pose a threat to Library collections. Food is prohibited from Library facilities, except in designated areas (e.g., staff lounges, retail service areas). Non-alcoholic drinks may be allowed in Library facilities in spill-proof, covered, plastic or metal containers. Individual Library units may impose stricter policies on food and drink in order to protect unique collections, or in order to adhere to the policies governing the buildings in which they are housed.
The full policy is available at: http://www.library.illinois.edu/administration/services/policies/patron_conduct.html
Please eat any food prior to entering the Undergraduate Library. The Espresso Royale Cafe is located directly outside the Library's entrance and you may use those tables to eat.