2025 NHL Winter Classic Official Game Puck Design (6oz. 1x3"). The 2025 NHL Winter Classic between the Chicago Blackhawks & the St. Louis Blues December 31st 2024 at Wrigley Field Chicago IL. Showcased in a clear acrylic presentation-worthy cube. Inglasco Inc. is the exclusive game puck supplier to all 32 NHL teams. The back of your 2025 NHL Winter Classic Official Game Puck Design features the NHL shield printed with patented heat sensitive ink it turns purple when frozen just like the actual puck used in every NHL Game! (NHL tracking technology not included within the hockey puck)