The choice of slants, stabs, deeps, petri dishes, bottles is determined by what you have available, organism, etc. You learn about these as you begin working with various organisms. Look in catalogs to see pictures of the glassware available. That lip makes it easier to pour contents from the tube. However, there is the disadvantage that the lips tend to chip and collect dust.
Culture tubes have no lip.
Plastic caps are availabe which telescope over the mouth of culture tubes protecting them from dust. Plastic caps can't be used with test tubes. Microbiologists can use test tubes, but most prefer culture tubes. Culture tubes are often cheaper. Screw cap tubes are more expensive, but the caps can be screwed on tightly to prevent drying and and to reduce contamination.