They are aromatically neutral and fluorescent coloured pop-ups.
The main feature is the "super buoyancy" even after being drilled.
We have left them neutral so that you can customize them according to your personal taste and your needs.
For a 100 gr jar insert 0.5 ml of NHDC and 1 ml of the aroma of your choice: shake the jar well and let the pop-ups rest so that they absorb the liquids inserted.