Unspillable bubble liquid bottle

I made this as I am tired of my kids spilling all their bubble liquid within the first 5 minutes of opening the bottle.

You will need a sheet of silicone, only a small piece, large enough to cut out a circle that will cover the inside of the lid with the slit. The silicone sheet I used is 0.75mm thick. I would not recommend sticking it to your lid using superglue, this is far too brittle and may come off. Instead, I would recommend using silicone glue.

This design is not without problems:
1. You require 2 lids, one with the wand attached which is also used for storage, one with the silicone sheet for preventing spills.
2. If the simple stick wand is rotated while inside the bottle, a small child may have difficulty getting it out again. There is a wide version of the wand that solves this problem.

Let me know if you find any other problems with the bottle or if you would recommend any improvements.