mwave has
Mwave LED 4 Color Shower Head, R/G/B/P color changing by temperature-controlled, 17 LEDs, no batteries or external power required from mwave.com for $35 + FS for mclub members (Free to join) + get $15 coupon you can use on your next purchase from them (no minimum)
If you have a review coupon, get the shower head for $30 + FS + $15 coupon
Description:
# 100% Hydropower, no batteries or external power required
# 4-color changing indicates water temperature for safety
# Easy installation
# Creates a rainbow color waterfall and makes showering fun
# Shower head colors/temperature:
GREEN:<=31deg C - 88 deg F
BLUE:31-36 deg C - 88 - 97 deg F
PURPLE: 36-41 deg C - 97 - 106 deg F
RED: 41-46 deg C - 106 - 115 deg F
FLASHING RED: >46 deg C - 115 deg F
# Water pressure requirements:1kg-2kg/cm2
# Water consumption: 1 minute / 2.5 gallons (9.5 liters)
# Material: ABS
# LED Qty: 17 LEDs
# Net W.: 0.23kg
Mwave LED 4 Color Shower Head color changing by temp $35(Or less)+ FS +Get $15 coupon 
