31. Stir rods are generally made of borosilicate ( commonly known as Pyrex ) or polypropylene. 32. Pyrex ) pipes of 90 mm diameter.33. The price includes a Pyrex pie plate that can be returned for a $ 4 rebate. 34. Lightly oil a 13-by-8 3 / 4-inch Pyrex baking dish. 35. A PYREX pie pan, similar in form to the Chicago Metallic, was also disappointing. 36. Place the filet on a micro-safe shallow plate such as a Pyrex pie dish. 37. Place the ramekins on a micro-safe shallow plate such as a Pyrex pie dish. 38. Grease or butter a 1 1 / 2-quart oven-proof glass Pyrex bowl. 39. The original Corning ware made of borosilicate glass was trademarked in capital letters ( PYREX ). 40. Vycor has an extremely low coefficient of thermal expansion, just one quarter that of Pyrex .