Hot Tub Chemical Float
This hot tub float is printed in 3 pieces. The main float is a hollow, floating container that holds 2" chlorine or bromine pucks. It has a rotating ring that adjusts the amount of chemical dispensed. And, it has a lid that snaps on the top. The hollow float is something that can only be manufactured by 3D printing ! It's not possible to injection mold such a product with a hollow interior.
PLEASE NOTE the STL files were generated in inches, so it may load as very tiny. You simply need to scale XYZ dimensions in your slicing engine by 25.4 in order to print in proper size.