1 - Open Adobe Photoshop and place the photo you want to put your design on.
2 - Select the Rectangle Tool (U)
3 - Draw a rectangle that has the size of the item (in this case the bucket)
4 - Right Click on the Rectangle Layer and select the “Convert to Smart Object” option
5 - Lower the Opacity of the rectangle so you can see the shape of the item (bucket)
6 - Select the Warp Option from Edit – Transform menu
7 - Use the Handles and the vertical lines to shape the rectangle on the item (bucket)
8 - Optional: you can rename the layer if you intend to sell the mockup
9 - Duble click the layer and place your design
10- Remove the background ad adjust you design size
11- Save (CTRL+S / CMD+S)
12- That’s all
For this tutorial I’ve used 8b1a72a808093d5b34de7c0dfb953966 from 5bbb6ce6b66e24dbc04017ebb7d41f8f and 3c9dcd717a5bb0c83dcf63e509bb470d that you can find in my shop on 74db866a9788afba2583263144863353