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Exploding straws are the result of faulty heat-sealing or a crack or break in the straw itself.  This is the only way a straw will explode.    Check out our Heat-Sealing Instructions for more information.

Liquid nitrogen seeps inside the straw through a faulty seal or crack and then expands quickly upon warming the straw.  If the crack is large enough the liquid nitrogen will simply shoot out the opening.  The end result is that the cells inside the straw are usually lost or dead. 

This occurrs by not heat-sealing with enough heat to melt the straw together.  Upon rapid cooling by plunging into liquid nitrogen, the plastic straw shrinks rapidly and can separate, in part or along the entire seal. 

To prevent this from happening you need to heat seal properly, using enough heat to melt the end of the straw completely.   Take a blank straw and heat seal it using the highest setting on your sealer (10), move to a new area of the straw and use the next highest setting (9), then the next highest (8), and so on.  Check your seals under a microscope to determine the best one and the correct setting. 

Check out our Heat-Sealing Instructions for more information. 


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