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Many arrived partially leaking in the box. Two reasons: 1) the caps were not screwed on tight enough (or in one case, but just one, the bottom seam completely split and entire contents were spilled out all over), and 2) no safety seal. I wouldn't recommend these if you intend them for BnB or Hotel guests because they don't have the safety seal. I used them in Hygiene Kits I make and hand out to the homeless and I think they were a good deal for that purpose.
If you need a near perfect size of shampoo for travel, this is for you. The shampoo seems to be of good quality and the right thickness to clean your hair. I have short hair and can get about 3 or 4 shampoos out of one bottle.