Energy bandwidth studies can serve as foundational references in framing the range (or bandwidth) of potential energy savings opportunities in U.S. manufacturing. This bandwidth study examines energy consumption and potential energy savings opportunities in U.S. glass products manufacturing. The study relies on multiple sources to estimate the energy used in four sub-processes for five sub-products in glass manufacturing representing 79% of sector-wide energy consumption in 2010. Energy savings opportunities for the sub-processes and sub-products studied are based on technologies currently in use or under development; these potential savings are then extrapolated to estimate sector-wide energy savings opportunity.