InventHelp Inventor Develops Modified Tumbler for Two Beverages (CHK-2211)

PITTSBURGH, April 3, 2025 /PRNewswire/ — “I thought there could be a more convenient way to carry two different beverages,” said an inventor, from Lombard, Ill., “so I invented the DUO TUMBLER. My design enables you to enjoy a greater variety of hot and cold beverages within one unit…