TILTY only has two parts, the lid and the cup.  No valves to lose or clean.  Snap on lid can be put on with only one hand, which can be helpful when dealing with a thirsty and unhappy child.

TILTY is dishwasher safe, top rack only.  TILTY has two drain holes to let the out water that collects under the angled wall.  TILTY is easy to clean without a dishwasher too.  The mouth piece is large enough to clean with a sponge.

TILTY is so easy to use, it was the only first place cup with a rating of 10 out of 10 for ease of use in Zrecommends - Sippy Cup Showdown 2009.