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Preform Plastic Test Tubes

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Product Info

The ultimate classroom test tube! These "preform" test tubes are the early stage of a plastic soda bottle. They are virtually indestructible, dishwasher safe, and they are clear to let young scientists see everything that is going on inside. These are also often used in geocache applications. Caps are included, and they are available in packs of 5, 15, or 30. Each preform test tube measures approx. 11 cm long x 2.5 cm in diameter (~4.3 in. x 1 in.), and holds about 25 cc (~0.84 fluid oz). Cap color may vary. 






test-tube-lava-lamp.jpgMake world's smallest Lava Lamp!

Simply fill one of our test tubes about a quarter full of water, add a few drops of food coloring, and fill the tube up to the collar with cooking oil. Now drop a piece of a fizzing tablet, such as Alka-Seltzer into the tube. The bubbles will lift the colored water and move them around like your own personal lava lamp! Add another tablet piece to keep it going.


Product Reviews

Showing reviews 1-10 of 13 | Next

  1. Great Pocket Fishing Kit Reel

    Posted by Rod - B'ham, AL on 07 22 2014

    I found this site several months ago and ordered 5 tubes to try them out as a "Dave Cantebury" style pocket fishing kit system. Although the tube he uses is bigger, these tubes work great. The cast is smooth, there's enough room to hold several small tackle items, and the fact that they are almost indestructible and water tight (use a real soda bottle top instead of the white cap that comes with the tubes...they're junk) makes it perfect!!! In fact, the smaller size is ideal for me because it fits into my stainless steel water bottle with nesting cup along with 3 out of the 5 C's of survivability. And these are the cheapest I have found them...less than $1 each!!!

  2. Great candy container

    Posted by Unknown on 02 02 2014

    I ordered these to hold jelly beans in the party bag for my son's science themed birthday party. They were nice a big and could hold a decent number of jelly beans. But I was impressed with how sturdy they are. I am sure they can be used for a bunch of other neat things beside holding candy.

  3. Great value for the price

    Posted by Unknown on 06 21 2013

    I purchased these for geocaching--they are very sturdy, watertight and inexpensive. I like that the log for the cache can be a little bigger.

  4. Good for storing yeast

    Posted by Unknown on 06 08 2013

    I'm using these for storing yeast. Perfect for this use.

  5. Great for travel

    Posted by Chuck on 03 30 2013

    I am a diabetic and I use these to carry extra needles and lancets in my kit. It's great how you can color code them with tops from soda bottles and still remain water tight.

  6. test tubes

    Posted by Unknown on 03 08 2013

    These were for a boys birthday party. They were perfect and fast delivery.

  7. Just the right size

    Posted by Unknown on 03 01 2013

    Been looking for storage containers about this size, they're perfect.

  8. Great for storing brewing yeast!

    Posted by Unknown on 10 22 2012

    Use these to store slants of yeast. Very strong, nice and clear.

  9. Great for geocaching

    Posted by Camper John on 09 17 2012

    Add a little spray paint for camo and these are great for cache containers. I put out a 14 cache series in Mississippi reflecting the 14 teams of the SEC. I have received many good comments on the containers.

  10. Work great for spice containers, too!

    Posted by Kara on 08 20 2012

    We used these to make my chemistry-loving mother a test-tube spice rack for her kitchen. She's been using it for over two years, and they still work great!

Showing reviews 1-10 of 13 | Next