The simplest way to connect plastic and rubber tubing to glassware is through the use of serrated hose barbs, either glass or plastic, or a combination of the two as use dictates. They are routine connections for the transfer of vacuum, gas and liquid, and come in a variety of forms. We have a number of off-the-shelf component choices, as well as the ability to fabricate specific sizes. The important information for sizing these components is the ID of the tubing that will be used, and to a certain extent, its hardness. Scroll down for examples of various hose barbs.
The style shown above is commonly called a "marie"