When it’s time to retire a tank, it’s always good to recycle it with a dive shop. But, for the savvy sentimental divers among us, there are plenty of ways to upcycle old cylinders so you can keep them around past their expiration dates. After all, you’ve had some great memories with your tanks. They might even be your best dive buddies, supporting you on all of your dives (hopefully) without fail. And, they probably cost you a pretty penny. Here are our favorite ideas for repurposing old tanks.

For a diver who’s also a bookworm, these creative bookends are the perfect addition to any shelf. They’re sold out on Etsy, but you can make a pair with a tank of your own.

Light up your world with a one-of-a-kind lamp that brings you back to your favorite underwater memories at the flip of a switch. You can find other styles of tank lamps on Etsy.

Make a statement with this outdoor table. Old tanks (granted they’re all the same height) make unconventional table legs that are sure to start up your dinnertime conversation. This diver opted to fill the middle of the table with shells. Remember, if you’re going to collect shells, please try to do so sustainably.

Display your favorite flowers in an upcycled tank. Buff it up or use metallic paint to give it a fresh look. Or, keep it rough for a little contrast.

Impress at your next dinner party by breaking out this scuba tank wine chiller. It provides plenty of insulation to keep your beverages cold all night long. Get one on Etsy.

Show off your passion for diving to the whole neighborhood. Get your whale mail delivered straight to your tank with this fun mailbox, complete with a diver-down flag. You can purchase this mailbox on Etsy. And make sure to get your shark stamps to keep all your mail ocean-themed.

Portable grilling at its finest. Looking for a fun DIY project? Turn your durable old tank into a charcoal grill for your next dive cookout.

Spruce up your garden with a decorative bell that’s sure to withstand any inclement weather. If you’re feeling creative, you can personalize it with an engraving or painted design like this diver did.