labels you can buy for pricing garage sale items?
Postino Std, and cut these at 0.5". This font was installed on my computer and I did not realize that it was so expensive! Another good choice would be SNF Universal from Lettering Delights. Or any bold font that you have installed on your computer. I did try using a "ball and stick" font like LD Delightful but I am afraid the kids will have too much trouble getting them on the container. It would fine for older kids though.
Amazon if you cannot find it locally. There was some discussion on Amazon about the color not being red, but mine is very red. It seems to be the same color as the one linked above at Amazon (see the item number above, almost exactly the same). I placed it up against a Staples bag so you can get an idea of the shade of red. This is a thinner vinyl but it is not transparent and sticks well. It is listed as repositionable which is great for the kids in case they want to rearrange initially.
(trying out my new "walk-around" lens that I got at Amazon with the photo above. It has macro, a feature that I was missing with my other two lenses and a great zoom area, 18-250. Not super fast but so far, I am liking it. Colors are true, focus seems sharp. Not a lot of bokeh but that was not what I was looking for in this lens. I think it's a winner for blogging! Love that macro ability.)
I used scotch tape to get the small pieces of the stenciled letters out.