If any of these products are already installed in a cooling system, SOPUS says they do not need to be drained or replaced because the lack of bitterant has no impact on product performance.
The Shell Rotella Ultra ELC 50/50 Pre-diluted Antifreeze/Coolant does have warnings on the label and child-resistant closures.
“We request that distributors, customers and retailers remove these specific products from their inventory, segregate them from [sellable] products and return or recycle it,” the recall notice says.
To begin a claim process, click here. Open product should then be taken to a local recycling facility or auto parts store to be recycled. Additional instructions around recycling can be found here.