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2. Test tube - Wikipedia

   en.wikipedia.org/wiki/Test_tube

   Test tubes are convenient containers for heating small amounts of liquids or solids with a Bunsen burner or alcohol burner. The tube is usually held by its neck with a clamp or tongs . By tilting the tube, the bottom can be heated to hundreds of degrees in the flame, while the neck remains relatively cool, possibly allowing vapours to condense ...

3. Laboratory sample tube - Wikipedia

   en.wikipedia.org/wiki/Laboratory_sample_tube

   Laboratory sample tubes are used to hold small quantities of substances undergoing experimentation or testing. These tubes are usually made of glass, but can also be made of plastic or metal. They vary in size and purpose. Laboratory sample tubes must not be confused with glass tubing, which can be utilized to carry fluid between laboratory ...

4. Vacutainer - Wikipedia

   en.wikipedia.org/wiki/Vacutainer

   A range of Vacutainer tubes containing blood. A vacutainer blood collection tube is a sterile glass or plastic test tube with a colored rubber stopper creating a vacuum seal inside of the tube, facilitating the drawing of a predetermined volume of liquid. Vacutainer tubes may contain additives designed to stabilize and preserve the specimen ...

5. Cuvette - Wikipedia

   en.wikipedia.org/wiki/Cuvette

   'little vessel') is a small tube-like container with straight sides and a circular or square cross-section. It is sealed at one end, and made of a clear, transparent material such as plastic, glass, or fused quartz.

6. Diffusion tube - Wikipedia

   en.wikipedia.org/wiki/Diffusion_tube

   A diffusion tube consists of a small, hollow, usually transparent, acrylic or polypropylene plastic tube, roughly 70mm long, with a cap at each end. One of the caps (coloured white) is either completely removed to activate the tube (in the case of nitrogen dioxide sampling) or contains a filter allowing in just the gas being studied.

7. Vial - Wikipedia

   en.wikipedia.org/wiki/Vial

   Plastic vials, which can be moulded in plastic, can have other closure systems, such as 'hinge caps' which snap shut when pressed. These are sometimes called flip-tops or snap caps. The bottom of a vial is often flat, unlike test tubes, which have usually a rounded bottom, but this is often not the case for small hinge-cap or snap-top vials ...