I ordered 3 packs of these (90 total) plastic test tubes so my summer school classes could make aquarium tubes depicting the layers of the ocean. The first two packs were great, no issues. The lids could be firmer as they dent easily. However, when I opened the third packet, there were several vials in that packet with no caps. They weren't anywhere in the package. Glad I had a few more otherwise I would have had very sad and frustrated 4-8 year olds who couldn't make their own aquarium jars. It looks like there might be some quality control issues, so order more than you need. The lack of detail is disappointing considering the price is quite high for what you get. Otherwise we liked this product.
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