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Test Tubes

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Items 1 - 30 of 76
  • Item #: 045972
    Retail: $1.33
    Rainbow Price: $1.25

    These cool tubes are actually used in the bottling industry to make 2-liter bottles. However, before hot, high-pressure air blows them up like a balloon, these thick plastic tubes are reusable, washable, almost indestructible, and perfect for a variety of science experiments. The clear, thick plastic tubes are about 5.5" tall and 1" in diameter and come with screw-on caps to keep contents secure. ~ Rachel

  • Item #: 002657
    Retail: $15.99
    Rainbow Price: $11.95

    Science is no longer just for the big kids—let your little ones join in the fun with this jumbo test tube set! Your budding scientists will love this set of 6 sturdy test tubes with an equally sturdy stand that holds them all. Each test tube measures 6" high x 1.5" diameter. The set includes 6 different colored screw-on lids for color-coding your tube contents. These tubes may look like toys, but they are intended for serious science. They have calibration marks for 25, 50, 75, and 100 ml and are safety tested for temperatures from 10° - 200° F. An activity guide will help you with a starter experiment and color mixing activity. Care instructions are also listed in the activity guide (remember to hand wash). ~ Donna

  • Item #: 013702
    Retail: $0.00
    Rainbow Price: $0.95

      The test tube is made of borosilicate glass with a rounded bottom, flared top lip, and has an outside diameter of 20mm, measuring 20x 150mm. This tube will work with racks #013700 and #070494.

  • Item #: 013701
    Retail: $0.00
    Rainbow Price: $0.55

    This test tube is made of borosilicate glass with a rounded bottom, flared top lip, and has an 18mm outside diameter, measuring 1x 150mm. This tube will work with racks #013700 and #070494.

  • Item #: 056677
    Retail: $0.00
    Rainbow Price: $0.50

      These test tubes are sold individually, have a 16mm outside diameter, and are made of borosilicate glass. Note: these test tubes will NOT fit in the 16mm test tube rack, #067539.

  • Item #: 049803
    Retail: $5.12
    Rainbow Price: $4.85
  • Item #: 066381
    Retail: $0.00
    Rainbow Price: $0.50

  • Item #: 024672
    Retail: $0.00
    Rainbow Price: $4.00

  • Item #: 035399
    Retail: $0.00
    Rainbow Price: $11.99
  • Item #: 056678
    Retail: $0.00
    Rainbow Price: $0.75

      This brush is approximately 7.5 inches (200 mm) in length with off-white, natural bristles and a galvanized steel handle.

  • Item #: 070494
    Retail: $0.00
    Rainbow Price: $3.50

    This test tube rack holds a bit bigger test tube. It has 6 – 25mm holes and 6 – 12mm drying pins. The holes will accommodate test tubes smaller than 25mm. Made of plastic, the rack is an affordable option for holding and drying your test tubes.

  • Item #: 013799
    Retail: $7.99
    Rainbow Price: $6.50

    Science exploration is not for older children only, and this test tube and dropper set will provide your little ones with an authentic lab experience. This set contains two 3" test tubes with colorful easy-twist lids, a stand to hold test tubes in place and a 4" long dropper, all a perfect fit for their hands. While no experiment guide is included, children can free play and experiment with mixing water and oil, mixing various food colored waters, or even create a mini-flood inside the tubes. You are only limited by your imagination in this fun, hands-on science set! A perfect complement to our Jumbo Test Tubes #002657. ~Deanne

  • Item #: 067539
    Retail: $0.00
    Rainbow Price: $3.50

    This test tube rack is made of plastic and offers 6 holes (16MM) for holding test tubes upright and 6 drying pins (12mm) for placing test tubes upside down after washing. Please note that this rack will hold test tubes smaller than 16mm. It will NOT fit 16mm test tubes. Test tubes that fit this rack - #066381

  • Item #: 045722
    Retail: $2.13
    Rainbow Price: $1.95

    Unleash your scientific creativity with this durable and inexpensive test tube set. It contains two 15 x 100 mm glass test tubes with a gray rubber stopper. The back of the package contains two sample experiments to help you get started. You will want to stock up on these! ~ Lisa

  • Item #: 013700
    Retail: $0.00
    Rainbow Price: $4.45

      Made of plastic, this rack will hold up to 12 test tubes of varying size. 4 holes are 20mm and will hold test tubes that are smaller than 20mm outside diameter, and 8 holes are 18mm and will hold test tubes smaller than 18mm outside diameter. There are also 12 pins for drying test tubes. Item numbers for our test tubes that will work with this rack are #049803, #013702, #032788, #066381, and # 056677.

  • Item #: 041388
    Retail: $23.99
    Rainbow Price: $20.40

    Science is weird. Really weird and sometimes confusing. But this kit is really not confusing…. it's just weird, sciency fun. Make worms, a superball, a Kleidagoo, and play with touchable bubbles and disappearing ink. Includes 5 different experiment tubes. So just have fun with the weird and avoid the confusing! ~ Janine

  • Item #: 064671
    Retail: $11.99
    Rainbow Price: $9.50

      Add this little set to your science curriculum to perform simple experiments. The set includes 5 heavy plastic test tubes w/ screw on lids, 5 activity cards and one test tube rack (five test tube holder). Each test tube holds 35mL (about 1 oz), and activities are very simple and done with items in your kitchen – mixing oil and water, dissolving items, colored flowers, liquid density, baking soda and vinegar reaction. Activity cards are 5.5x8.5”, and include a materials list, step-by-step instructions, observations, and explanation of the results. This is a very nice starter for your young scientists. ~ Donna

  • Item #: 033126
    Retail: $0.00
    Rainbow Price: $1.50
  • Item #: 000603
    Retail: $4.49
    Rainbow Price: $3.56

    Grow ice… And fish! Just add water to the polymer shapes to make them grow exponentially (and get squishy!). Two fish are included in this kit (you won't believe how big they get!), along with a bunch of "ice cubes" that turn clear and disappear in water. Find out why and how by reading the included guide! Comes with a giant test tube that is actually a soda bottle before it goes through an "inflation" process at the factory.

  • Item #: 012024
    Retail: $4.95
    Rainbow Price: $4.40

  • Item #: 012028
    Retail: $4.95
    Rainbow Price: $4.40

  • Item #: 049711
    Retail: $39.90
    Rainbow Price: $33.95
  • Item #: 013682
    Retail: $19.99
    Rainbow Price: $15.75

    A great combination of puzzle solving ability and manual dexterity. 1 to 4 players race to complete each “formula.” Players start with three test tubes, each with a pair of purple, red, or green marbles. The “formula” card shows the desired arrangement of the marbles in the test tubes. “Pour” the marbles back and forth between the test tubes without touching the marbles and be the first to match the pattern. All players compete every round, so the 54 challenge cards are usually completed in about 15 minutes. ~ Bob

  • Item #: 033681
    Retail: $39.99
    Rainbow Price: $31.95

  • Item #: 041716
    Retail: $15.00
    Rainbow Price: $11.75

    Includes thermometer, evaporation chamber, 4 weeks of weather charts, a bead level indicator, test tube, plastic container, suction cups, compass, and parts to build a wind vane and wind speed instrument.

  • Item #: 060638
    Retail: $19.99
    Rainbow Price: $15.95
  • Item #: 012036
    Retail: $4.95
    Rainbow Price: $4.40

  • Item #: 012072
    Retail: $4.95
    Rainbow Price: $4.40

  • Item #: 012087
    Retail: $4.95
    Rainbow Price: $4.40

  • Item #: 018504
    Retail: $0.00
    Rainbow Price: $64.95

    For Advanced Chemistry, this set contains the following: 16 chemicals, zinc & copper strips, small funnel, chemical scoop, depression plate, test tube rack, PH chart, chromatography paper, 9-volt battery cap, 5 test tubes and caps, filter paper, starch peanuts, cotton swabs, 5 dropper pipettes, and safety goggles.