Sippy Cups for Toddlers 1-3: Functioning as both sippy cups and straw cups, this 3 Pack offers versatility to suit different preferences. Nuby's 3 Pack Toddler Sippy Cups 1-3 feature a highly efficient no-spill design and Color Aqua, Blue, Green ensuring a mess-free experience for both toddlers. The innovative design prevents spills and leaks, making it an ideal choice. Nuby prioritizes safety, providing parents with peace of mind. These sippy cups are designed with an easy and firm grip specifically tailored for toddlers. The ergonomic design promotes independent drinking as little hands can easily grasp and hold onto the cups. The spill-proof feature of these toddler cups adds an extra layer of convenience to parents' lives. Whether at home, in the car, or at playdates, the spill-proof technology minimizes the chances of liquid accidents. The straw design provides an alternative drinking method for toddlers transitioning from bottles to cups. The ways NOT to use this cup: Biting the straw anywhere below, in-line or above the valve. Sucking on the straw. Do not use the lower teeth/gums. The way to use the cup: Place the straw end on your tongue and applying force against the upper palate / teeth or in a child's case gums, then suck.