Technical Manufacturing Corp. is offering the Cleantop II optical top, an optical table with a spill-proof core. Individual Cleantop II cups are epoxy-bonded under each tapped hole prior to bonding. The cups are made of chemically resistant nylon-6; a stainless steel version is also available. Holes can be tapped and countersunk before the cups are added, allowing the machined top plate to be cleaned with open holes prior to bonding. A high-pressure, high-temperature cleaning solution clears machining debris.