Sargent Art Set of 10 No-Spill Paint Cups with Flip Open Lids are a "patented" design offered exclusively from Sargent Art. Easy-open, tab lid with locking clasp never detaches. Twist-off, grooved rim caps allow for convenient, spill-free refilling. Sturdy cap tabs won't break off and cups have fill-line indicator and dual brush holders. Inner rim seals recycle moisture and prevent evaporation.