Found some of these at target on clearance. I think it was like 6 bucks. Tore it open and removed inside structures. Used some extra acrylic I had around the house and cut and shaped it to the bottom and then uses plastic silicon sealer. I have a nice new betta tank on the cheap.
Here is a link to what it originally looked like.
[ame=http://www.amazon.com/Summit-Backyard-Outfitters-Lighted-Habitat/dp/B003IPD786/ref=sr_1_1?ie=UTF8&qid=1344393376&sr=8-1&keywords=backyard+safari+lighted+habitat]Summit Backyard Safari Outfitters Land & Water Lighted Habitat : Toys & Games : Amazon.com[/ame]
A lot more durable than those critter keepers you pay 20 bucks for. I'll get pics with the fish in it my battery died after I took that first pic.