Amazon.com: HyperX Pudding Keycaps - Double Shot PBT Keycap Set with Translucent Layer, for Mechanical Keyboards, Full 104 Key Set, OEM Profile, English (US) Layout - Black : Electronics
Keychron K2 HyperX Pudding Keycaps + Foam Mod - YouTube
HyperX Pudding Keycaps v2 Review (Hardware) - Official GBAtemp Review | GBAtemp.net - The Independent Video Game Community
If you wonder what the K4 would look like with pudding keycaps, here you go. : r/Keychron