A sippy cup for smoothies should be leak-proof, easy to clean, and thick-drink friendly. This guide highlights five options that balance spill resistance, durability, and kid-friendly design. Each pick is best for a different need—on-the-go travel, insulation to keep drinks cold, or a sturdy stainless steel option for thicker smoothies. The quick-reference table below helps you compare at a glance.
| Product | Best For |
|---|---|
| Zak Designs Kelso Toddler 15oz | Travel and at-home use; leak-proof design |
| Dr. Brown’s Milestones Insulated 10 oz | Keeping smoothies cold on the go |
| Elk and Friends 10oz Stainless Steel | Durable, no-valve smoothie sipping |
| Owala 12oz Insulated Stainless Steel | Easy cleaning and spill resistance |
| Elk and Friends 8oz Glass Mason Jar | Glass option with protection for smoothies at home |
Zak Designs Kelso Toddler 15oz Cup

Material: Plastic with silicone straw; 15-ounce capacity. Features include a built-in leak-proof valve in the straw, disassembly for easy cleaning, and dishwasher-safe plastic. Not microwave-safe. Best for families seeking a lightweight travel cup with a reliable seal and kid-friendly design. Caution: straw valve may require regular cleaning to maintain flow.
Dr. Brown’s Milestones Insulated Sippy Cup, 10 oz

Insulation helps keep smoothies cold and fresh, while a sliding lid protects the straw when not in use. Lightweight with easy-grip handles that can be removed as a child grows. Best for toddlers who need a cooler drink on outings. Limitation: 10-ounce capacity may require refills for longer trips.
Elk and Friends 10oz Stainless Steel Cup

Stainless steel with a silicone sleeve for grip and drop protection. Features a smooth-flow silicone straw with a stopper for easy sipping and reduced mess. Best for smoothies and thicker drinks, especially when durability matters. Caution: no valve means liquid can flow out if the cup is tipped upside down.
Owala Kids Insulated Stainless Cup, 12 Oz

12-ounce insulated tumbler with a spill-resistant lid and a removable, easy-to-clean straw. Designed for simple cleaning and travel-friendly use. Best for households needing a versatile cup that handles smoothies and regular drinks alike. Limitation: straw gasket may require occasional inspection for wear.
Elk and Friends 8oz Glass Mason Jar Cup

Glass mason jars with protective silicone sleeves and a stopper-equipped silicone straw. Ideal for at-home smoothie sipping and kids learning to drink independently. Best for parents who prefer a glass option with added grip. Limitation: glass is more fragile than metal or plastic; not ideal for rough handling.
Buying Guide
What to look for in a smoothie-friendly sippy cup
- Seal and spill resistance: A leak-proof design prevents messes during transport and meals.
- Drink-thick compatibility: Straws and spouts should handle thicker beverages like smoothies without clogging.
- Ease of cleaning: Removable parts and dishwasher-safe components save time for busy families.
- Durability: Stainless steel or robust plastic often performs better for on-the-go use.
- Safety and materials: BPA-free and food-grade materials protect health for kids under 3.
Material comparisons
- Plastic with silicone straw: Lightweight and affordable; needs cleaning attention to valve components.
- Stainless steel with silicone spout: Durable, temperature-retaining, and often dishwasher-safe; check for removable lids for easy cleaning.
- Glass with silicone sleeve: Safe in terms of taste, but heavier and more fragile; sleeves help protect from drops.
Which cup is best for your child?
- Travel and portability: Zak Kelso 15oz or Zak Kelso 12oz stainless option offer leak-proof designs and travel-friendly sizes.
- Cold smoothies on outings: Dr. Brown’s Milestones insulated cup keeps drinks cold longer.
- Durability for rough handling: Elk and Friends stainless steel option provides robust construction.
- Simple cleaning and daily use: Owala’s spill-resistant design combines ease of cleaning with reliable spill protection.
- Glass preference at home: Elk and Friends glass mason jar option blends glass safety with protective sleeves.
Important care tips
- Disassemble parts regularly to prevent mold buildup, especially around straw valves and lids.
- Follow dishwasher instructions; some parts are top-rack safe only.
- Inspect straws and valves for wear and replace as needed to maintain a clean flow.
FAQ
- Are these cups dishwasher safe? Most listed cups are dishwasher safe for parts, but always verify the product page for specific instructions.
- Can smoothies be too thick for sippy cups? Some cups are designed for thick drinks with wide straws; thinner liquids will flow easily through most designs.
- Which cup is best for travel? The Zak Designs Kelso 15oz and the Zak Designs Kelso 12oz stainless option are both travel-friendly with leak-proof designs.
- Is glass safe for toddlers? Glass options are safe when protected by sleeves, but require careful handling to prevent breakage.
- Do these cups keep drinks cold? Insulated cups like Dr. Brown’s Milestones and Owala help maintain cooler temperatures for longer periods.
- When should I replace a straw or valve? Replace if you notice cracking, stiffness, or reduced flow to avoid leaks and maintain hygiene.