Ughh! There are certain materials and products that even though they may not be lead based or are difficult to extract the lead from are still perhaps unsuitable for children's products.
That being said I really wish people would move on from swarovski crystals...its over. Find other ways to achieve your "bling" fix. As a mom, I personally find it appalling that there are people out there who think its okay to GLUE things onto the items of infants and young children simply because it looks cute. I remember the rhinestone covered pacifiers and onesies. I never bought any of them...because anyone who has a child knows that they put everything in their mouth. Evidently children don't read warning labels...
And glue becomes brittle after a while especially when its exposed to moisture either through washing or a child's mouth heightening the possibility that a stray crystal may dislodge. This is regardless of the kind of glue that you use. Sewing on would be better in terms of apparel but few who get into that game are going to take the time or have the ability to sew on their crystals which is why they glue them on to begin with. In terms of gluing things on pacifiers, bottles, plates(yes I have seen it),spoons, pillows, toys....give it up. Glue is not our friend.
Now I will say an option for those who use crystals decoratively in items like headbands( an entirely different product than a bottle ) perhaps those plastic gems would be a better option. Less glitz because there's not a good deal of the refractive light qualities that come with crystal, but there is still some. Again, even with these I would suggest sew-on versus glue on....
******Annoyed because I just read through a recall memo from CPSC regarding etsy and ebay sellers back in 2007 and wondered where is the common sense?