Instead, I bought a set of 2 mini colanders with straight sides and a fine mesh bottom. They are much too big to fit into a tuna can, but the larger one fits over the top of all but the big cans of tomatoes. The smaller one fits nicely into my 20 oz coffee mugs, so I cut the handle shorter and use that one for brewing loose leaf tea, or straining the tea leaves out, if a tea bag breaks.