Most of our stocks are media supplies (agar, yeast extract, tryptone) and additives (various salts for minimal media, antibiotics, carbon sources). We have stuff for molecular biology (buffers like Tris and HEPES, a few solvents, acids and bases, restriction PCR and other enzymes). Biochemistry supplies (Buffers again, chromatography media, compounds like imidizole for chromatography, metabolites like gluconate-6-phosphate for protein assays). Supplies for running DNA, RNA and protein gels (agarose, polyacrylamide, TEMED, ethidium bromide). Tons of dyes used for various assays (congo red for cellulose, neutral red for PHBs).
We usually have a ton of random stuff from when a professor retires and just leaves their chemical supplies out for all to take, but that still doesn't explain the lidocaine.