Designed specifically for the Lights4Fun range of LED tealights and white/colour submersibles (because they are brighter not because the object is submersible) http://www.lights4fun.co.uk/c/q/indoor-lights/indoor-battery-lights/led-tea-lights There is a generic shade with the 2 adapters for the submersibles (they are different shapes for some reason) as well as shade specifically for each shape submersible.
Download from thingiverse