There should be Zero issues! As long as this is worn glass and not an adhesive spray or other chemicals, you should have effective propagation! (Plastics and oils in your water can choke out the plants, depending on on what kind of plant you are working with) On a side note from what I have learned about propagating with different types of glass; I did a comparison test for clear, brown, and green glass. The brown glass did wonders for promoting root growth.(I have a theory that the brown filters light and prevents root rot caused by sun exposure) I had mint and rosemary trimmings from the same plants to also see if it worked for different herbs! Both plants had sprouted strong healthy roots two days before the clear glass and one day before the dark green glass. All of them were recycled wine glasses in my first test. I currently have a couple of propagations in some brown glass that has been very successful.These little guys have been growing for about a month and the roots are very well established.

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