WeeSprout 3-in-1 Glass Cups for Kids are the perfect step up for little ones learning to sip like big kids — without giving parents a reason to stress over spills. These durable glass jars are designed for every stage of development with a flexible system that transitions from drinks to storage: use them as smoothie cups, food containers, or on-the-go snack jars. Designed with speech pathologist recommendations in mind, each cup features a curved straw with an open valve to support healthy oral development and proper tongue placement — ideal for kids transitioning from a sippy cup to open cup drinking. Soft, food-grade silicone straws are gentle on gums and teeth and ideal for thicker drinks like smoothies. Built-in straw stoppers keep straws in place — no more flying messes or sticky hands. Each set includes both drinking lids and storage lids for maximum versatility. Protective silicone sleeves with viewing slits provide grip, help prevent breakage, and let you check contents at a glance. Available Sizes:– 8 oz jars measure 2.88" W × 4" H and include measurement markings up to 5 oz– 12 oz jars measure 2.88" W × 5.5" H and include measurement markings up to 10 oz Recommended Age: 3 years and up (use with adult supervision)