I have a few spare glass bottles and want to explore what decoration I can make with them, without just painting outside them.
Preferably safe, in case of an accidental breakage or leak. Preferably indefinite shelf-life.
Some ideas:
- Density layering experiments (‘rainbow in a jar’, maybe suspending an upside-down toy boat in a dense clear liquid with a blue watery liquid on-top)
- Phosphorescent liquids to glow in the dark (pref with no UV lamp needed)
- The oil+water+antacid+food coloring lava lamp, but the effect is probably too short-lasting to have running for a few hours
Sand art.
My kids made tgat for mothersday once. Looks actually nice. It’s still on display after 5 years or so
The blood of the foes who have fallen before you.

Ferrofluid for sure
The proper stuff is expensive (~$1USD/ml), NileRed’s recipe is 2chem4me, but the cheaper ferrous suspension methods might be workable…
Water and food coloring in a window is pretty sweet. Especially with multiple colors.
Tempted to try the Traffic Light Reactuon, but I don’t know how safe it is to store something that alkaline in a regular glass bottle long-term
following on from an earlier comment in anothe thread, nitrated organic compounds come to mind, Toluene or Glycine.
The story I shared (or maybe some other online chat) may have got me on a watch list post the events of September 2001, so use at your own discretion.
deleted by creator
Meth
Have you considered Spiegel im Spiegel.
Do you mean an infinite mirror, like this?










