Cheap good hand grip for the TZ101/ZS100: Panasonic Compact Camera Talk Forum: Digital Photography Review
Amazon.com : Panasonic LUMIX ZS100 4K Point and Shoot Camera, 10X LEICA DC VARIO-ELMARIT F2.8-5.9 Lens with Hybrid O.I.S., 20.1 Megapixels, 1 Inch High Sensitivity Sensor, 3 Inch LCD, DMC-ZS100S (USA SILVER) :
1 * Skidproof Hand Grip For Panasonic Lumix ZS110 TZ100 Camera | eBay
Sony RX100 VI pocketsize 8x zoom beats 10x Panasonic ZS100
ZS100 Custom Grip: Panasonic Compact Camera Talk Forum: Digital Photography Review