All bath games below were likely sold at Rite-Aid stores. (a pharmacy type place like CVS / Walgreens etc) The liquid should be good inside even after 10+ years. Playing with it in the bath made the label easy to rub off/damage. Info provided by: ShelaFox
Sonic Bath Bubbles, with Bath Game. You can push the buttons after filling the game with water to help Sonic collect "rings" on little points inside. This is by Kids Choice and says it makes getting clean, fun. This has the Sonic 3D Blast style of art, so was likely from that period. But where was it sold?
And still another of this 'bath game' stuff! How many different re-takes of this combination soap+mini-game did they make? This one is a Bath Bubbles container. As you can see here, it's pretty much the same design as the others, but with a blue case and 4 buttons. The gameplay of this one is similar to the others, in that you're using the buttons to create currents in the water in the game to catch plastic rings.
The back encourages you to get other Sonic theme bath products, but doesn't tell you what they are. You can see Eggman in the background of this Sonic Adventure 1 picture. This was made by "The Body Care Group" in 2000 The ingredients are rather sophisticated, and include extracts of Aloe Vera, cucumber, sea kelp, green tea and vitamin E in "de-ionized" water."
More bath bubbles. Or really, the same bath bubbles but this time in an aqua blue plastic container. It has the same background image as the green body wash above, but this time you can see Tails is in the background more clearly. The top says 'kids choice' but no brand really appears. Why did they keep changing the color of this same bottle?
Here, you can see the smooth (left) and ridged (right) are both being used to contain the same thing: body wash. The left is older, with Sonic & Tails in the Sonic 3 checkered/sphere collecting special stage and the right just having a 3D art of Sonic pulled from SA1.
As usual, each bottle-front contains a little window full of water where you can press the buttons to catch the plastic rings on the poles inside. Interestingly, the left bottle's design looks better put-together than the right one.
Still more bath games and shampoos/body washes. How many of these things did they feel the need to keep on making? It's curious that they varied the design so many times, likely making them more collectible. But where were they found? To have so many releases, they had to have been fairly available and popular as well.
Here's an interesting one, a Sonic Adventure 1 era shampoo game. Most items were better marketed by that point, but this seems to be an exception. You're still catching rings here, but it has different buttons, and SA art. It says "Cool ###" at the top, but the photo is not that clear.
Sonic Bath Bubbles, with Bath Game. You can push the buttons after filling the game with water to help Sonic collect "rings" on little points inside. This is by Kids Choice and says it makes getting clean, fun. This has the Sonic 3D Blast style of art, so was likely from that period. But where was it sold?
Yet ANOTHER variation of the same basic shampoo/bath game bottle. This one is another conditioning shampoo, but it has the SA1 art of Sonic & Knuckles as the background for the rings game. This art is also shared by a wallscroll as are many of the other bottle arts seen on this page. Just how many of these were made...