Wheaton Media Bottles are manufactured from Wheaton 400 borosilicate glass

Media Lab bottles have 25mL graduations and a writing patch.

The glass conforms to USP Type I requirements and has a low alkali content to help prevent changes in pH. This also helps to maintain the purity of its contents. The pour lip and sloped shoulders facilitate pouring and cleaning. Pre-attached black phenolic screw caps with liner are attached to each bottle.