Boston Round Narrow Mouth PET bottles are a great choice for pharmaceutical products, household chemicals, preserving agents and any application requiring shatter resistance and strong consumer appeal. Squat bottles are shorter and wider than their standard cousins. Get them in clear, blue, green, or amber. (Choose amber for light sensitive items). Amber, Blue & Green bottles include a black polypropylene cap with foam liner. Clear bottles include a white polypropylene cap with foam liner.