The Playtex Sipster Cup is sort of a classic. These cups have been around forever, and there’s a reason for it. They are durable plastic, and including the valve they only have three parts. They are easy to clean, stand up great to wear and tear, and unlike most sippy cups, they really don’t leak. The valves can be purchased separately. These cups work best for toddlers and kids that are used to drinking from sippy cups because they have a hard spout and they take a fair amount of suction to get liquid out.