Every coin you drop into this tank feels like a promise to your future self. It’s big, bold, and way more exciting than a regular piggy bank.
With its vibrant green coat, it’s almost like your money is growing inside a little steel garden. You’ll enjoy hearing that satisfying clink each time, knowing that small savings can turn into something special.
Plus, you get bragging rights for turning scrap metal into a money-saving machine.
Materials Needed
- 1 empty propane or helium tank (approx. 12” × 18”)
- Metal cutting tool (like an angle grinder or rotary tool)
- Metal file for smoothing rough edges
- Primer spray paint (1 can)
- Glossy spray paint (green, or your favorite color, 2 cans)
- Clear enamel spray (1 can, optional for sealing)
- Protective gloves, goggles, and mask
Step-by-step Guide
Step 1: Make sure your tank is completely empty. Fill it with soapy water and let it sit overnight to push out any lingering fumes. Once it’s fully drained and dry, you’re ready.
Step 2: Choose where you want your coin slot, usually on the top surface. Then use an angle grinder or rotary tool to cut a straight slot about 2.5” long and just wide enough for coins to fit through.
Step 3: Smooth the edges with a metal file. This step is crucial, since you don’t want sharp edges snagging your fingers when you drop in coins.
Step 4: Spray on a coat of primer to prepare the surface. Once dry, layer on two coats of your chosen paint, letting each coat dry completely. A glossy finish works best for that “new piggy bank” shine.
Step 5: If you want your bank to last years, seal it with clear enamel spray. Now it’s ready to gobble up your loose change.
Tips: I’d recommend adding a hidden panel or removable base if you want easier access to your savings. Otherwise, you’ll need to cut it open when it’s full.