Here is a sink “appliance” you did not know you needed; a glass rinser.
Do you ever have to scrub out your smoothie glass, or maybe it is the baby bottle that gives you fits. Delta now has a glass rinser that uses high-pressure water jets to reach those hard to get to areas.
It can be easily installed in an empty countertop or sink hole like those used for soap dispensers or the sink sprayer. The glass rinser can handle drinkware that has an opening from 1 inch to 3.6 inches in diameter. Places like Starbucks have been using these for years, now you can have one in your own home. 
Photos are from www.deltafaucet.com/