Take on the 'smudge-proof' challenge and prove HP's ink will not smudge with a water gun. Test your speed in the 'Scan and Save' challenge, saving printed receipts via HP's phone app in 30 seconds or less. Participants will get an exclusive HP Smart Tank Shirt and a chance to win exciting prizes. Plus, enjoy up to Php 1,000 in GCash cashback when you buy participating HP printers until March 31, 2023. To join, visit their participating stores – Silicon Valley, Octagon, Office Warehouse, and PC Express. See you there!