https://www.instagram.com/reel/CYBFRJuKz4o/?utm_source=ig_web_button_share_sheet&fbclid=IwAR2BCs7jwU8hloji4ypsLt4sv1LihrIwckjNjJY7hxrJpG12AY0yHe9fFIM
Great link for a demonstration with a custom stamp for the side of a mug. See the process first hand with Instagram link.
Custom Stamp for mugs