The conical, straight-sided pint glass, also known as a Boston shaker glass, was originally used to shake cocktails, not serve beer. But it has been a fixture in bars since the early 20th century, thanks to its utility: Itâs easy to stack, hard to break and perfect for displaying beer or bar advertisements.
Apart from glove material, other factors contributed to glove permeability, such as the duration of exposure, the thickness of the material, and the liposolubility or the molecular weight of the drug. Permeation was clearly related to the duration of exposure. All glove materials displayed a general trend toward greater permeation over time, increasing by a mean 5-fold factor between 15 and 60 minutes (the steepest increase being observed during the first 15 minutes).
Compared to synthetic vinyl material, nitrile gloves are less likely to tear with a higher resistance of being punctured; however, this does not mean that nitrile gloves are impervious. You try hard enough; you can tear any exam glove whether it's made out of latex or nitrile.