I'm in southern Louisiana for a few days, and I have seen Slice peach, strawberry, grape, orange, diet orange in 12pks and 2L's at Rouse's supermarkets in Houma. Also saw Slice vending machines (not new ones) at several Rouse's. The product came from the PepsiAmericas plant in Reserve LA.
As far as I know, both Collierville and Reserve have continued to produce Slice (in the 4 flavors and 1 diet) even after Twisters was introduced.

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90 years of Cheer...1917-2007