These are cheaply made or cheap material - popped too easily

I bought. these for my son's birthday - hard to go wrong with balloons. They blew up fine, colors are as expected, nothing to complain about - then slowly over the course of the next hour, about 3 of the balloons just popped. They were sitting on a table so nothing touched them at all - they just exploded on their own. About one in 4 just pops out of the blue each time I've used them (3 occasions now). Will not buy again and if you have young children who will be playing with them, definitely stay away - could be very dangerous.

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