Only use Gatorade or G2 bottles for the sensory bottles they are a heavier plastic so they hold up better and keep a unison look so everything looks good. They come in different sizes you can find smaller ones for small hands if you need to.
Make sure to ALWAYS seal your bottles securely! I cannot emphasize this enough. Unless you want your bottle opened and the contents poured out. SEAL IT… with glue. Duct tape can be peeled off by a determined kiddo. Glue is much harder for them to open up.
These go along with my theme bottles I do every year. They go with our weather unit. I aslo use them when we talk about season. There is a sunny bottle, Rainy bottle, Cloudy bottle, snowy bottle, and a fire storm (My daughter made that one :))
The Sunny Bottle consists of water with some blue food coloring. Then the kids found the biggest yellow pompom they could find for the Sun. There is also gold glitter my kids wanted to put them in for the sun shine rays.
The Cloudy bottle. Has water, white and light gray pompoms
The Windy bottle has water and plastic gem leaves I bought at Michaels at the end of Autumn.
Rainy Weather Bottle. This bottle my kids went a little crazy on. There is water as a base, different color blue plastic beads, blue glass beads, blue and silver glitter. Pipe cleaners for lightening. white cotton balls for clouds.
For a list of ALL my amazing DISCOVERY BOTTLE IDEAS click the link or the image below