Re-use cookie tins by using them as storage bins for art supplies (or any other kinds of craft supplies). The round ones in particular are perfect for holding a round palette! Paint tubes fit, even brushes fit.
Specifically, I use this cookie tin for my watercolor supplies. This colorful artwork by Isabel Alvarez made me want to paint something and I easily took out the supplies I needed. All that was left to get was water. Seriously, the tin becomes a convenient little carrying case.
The tin I used was full of Christmas cookies and had an allover red with snowflakes theme going on. So I spray painted over it, nothing fancy though like I've seen some people do. I just didn't want to see the holiday theme. I spray painted it with the lid on and because of that there is still some of the old design showing when the lid is off. Doesn't bother me too much, it's closed most of the time.
If this cookie tin had been a vintage tin with a lovely vintage design, of course I would've left it alone. Just check out these fabulous upcycled vintage tins...DIY Project: Ashley's Vintage Tin Candles
Craft Studio Organizer Caddy from Vintage Tin Canisters by Seelamade
Vintage Container Succulent Planters by House by Hoff
Upcycled Vintage Cookie/Candy Tin Bird Feeders by JUNKMARKET Style
Repurposed Vintage Tin Bangle Bracelets by Nostalgic Summer
Cookie Tin to Coffee Bin by Carolyns Homework
"Polly Wants A Margarita" necklace by Emily Hickman, Tin Moon Jewelryworks