This polypropylene bowl is great for mixing small amounts of adhesive or grout.  It has a 500ml capacity, is 8cm high, and measures 11.5cm across the top. A great bonus: left-over mix can be allowed to dry in the bowl, and a quick squeeze of its flexible sides will crack any dried up residue allowing it to be scraped out easily. For once, you can feel fine about not clearing up after yourself as soon as you finish work