The anti-bullying emojis, developed with anti-bullying ambassador Monica Lewinsky, will appear on Snapchat as geofilter photo overlays. The Vodafone Foundation has pledged to donate a pound per retweet or like of the #BeStrong emojis hashtag. Its head of consumer policy Lisa Felton told "Marketing Week": “Around 84% of our UK instant messaging traffic comes from Snapchat -- that’s more than WhatsApp and iMessage combined -- so we this as a real opportunity to spread a positive social message to teenagers.”