Costco has the Costco! Seville Classics 2-Tier Under the Sink Expanding Organizer! $19!!! for $19!!! They sell it online as well ( https://amzn.to/2M23BxP ) . This organizer will allow your add another shelf to your kitchen sink .
Costco, Costco finds, costco deals, organiazation, under the sink, under the sink storage. Seville Classics, 2-Tier Under the Sink Expanding Organizer