Safety Seal for powders

Wondering about safety seals for spice shaker bottles.  I -think- I can get shrink wrap approved, but would rather have both the shrink wrap tamper proof thing along with the paper / plastic circle under the shaker.  Does anyone have experience?  If so, what sticks them to the top of the bottle?  Is there a peal and stick solution or do you have to glue them somehow?
 
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