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.
I love this bottle! You will need hair gel. I filled the bottle a little more than half way with gel and then I added my rubber bands. You can use any size rubber bands. I like the mini colorful ones. I got mine at the Dollar Store. I added the rubberbands after I had filled the bottle half way with gel. Then I finished filling the bottle with gel.
For a list of ALL my amazing DISCOVERY BOTTLE IDEAS click the link or the image below