Zak Designs Kelso Insulated Tumbler, 12 oz.
The Zak Designs Kelso Insulated Tumbler, 12 oz. holds 12 oz and lists 10 hours cold, per Zak Designs. A 12 oz double-wall vacuum-insulated tumbler with a silicone spout and a built-in straw valve.
- 12 ozHolds
- YesInsulated
- 3+Age
- $14.99List price
How the Kelso Insulated Tumbler, 12 oz. stacks up
Against the 34 insulated and stainless kids' cups we track. The shaded band is where the middle half of them fall; the dot is this one.
Within the typical range for insulated and stainless kids' cups (10 oz to 15 oz).
Below the typical range for insulated and stainless kids' cups (12 hr to 20 hr).
Within the typical range for insulated and stainless kids' cups ($14.99 to $26.95).
What sets the Kelso Insulated Tumbler, 12 oz. apart
Measured against the 34 insulated and stainless kids' cups we compare, from each maker's published specs.
- Capacity: 12 ozin the middle half of the 28 insulated and stainless kids' cups that publish it (10 oz to 15 oz)
- Hours cold (maker): 10 hrbelow the middle half of the 15 insulated and stainless kids' cups that publish it (12 hr to 20 hr)
Next to its closest matches
- Owala Kids' TumblerNext to it, the Kelso Insulated Tumbler, 12 oz. is 3 oz less capacity.
- b.box 12oz insulated water bottle for kidsNext to it, the Kelso Insulated Tumbler, 12 oz. is 2 hr longer cold time; $12 less.
Cup at a glance
As Zak Designs lists it.
| Drink style | straw |
|---|---|
| Capacity | 12 oz |
| Leaks (maker's words) | built-in straw valve prevents spills when tipped, shaken |
| Valve | Yes |
| Insulated | Yes |
| Hours cold (maker's words) | up to 10 hours |
| Body material | stainless steel and silicone |
| Spout or straw material | silicone |
| Age on the label | 3+ |
Parts and cleaning
| Dishwasher (maker) | Yes |
|---|---|
| Microwave (maker) | No |
Listed features
- Maker gives a 10 hour cold figure
- Built-in straw valve
Worth checking
- Valve can be damaged by straw brushes
- Maker recommends hand washing
Where to buy the Kelso Insulated Tumbler, 12 oz.
Prices and availability change. We may earn a commission from some links.
- Check for recalls: Search the agency's recall list with the model number and date code from the label: CPSC recall search.
- Teeth and cups: see the AAP's first tooth page. Check the label and the maker's instructions, and ask your pediatrician about your child.
Full specs
| Zak Designs Kelso Insulated Tumbler, 12 oz. | |
|---|---|
| Type | Insulated or stainless kids' cup |
| List price | $14.99 |
| Capacity | 12 oz |
| Drinks from | straw |
| Spills | "built-in straw valve prevents spills when tipped, shaken", per the maker |
| Valve | Yes |
| Material | stainless steel and silicone |
| Spout or straw | silicone |
| Insulated | Yes, per the maker |
| Keeps cold | up to 10 hours |
| Dishwasher | Yes, per the maker |
| Age | 3+ |
Compare the Kelso Insulated Tumbler, 12 oz. with
How each closest rival differs from the Kelso Insulated Tumbler, 12 oz., from the makers' specs.
- YETIRambler Jr. 12 oz Kids Water Bottle12 ozCompare side by side
- OwalaKids' Tumbler15 oz
- 3 oz more capacity
- b.box12oz insulated water bottle for kids$2612 oz$26.95
- 2 hr shorter cold time
- $12 more
- Skip HopSpark Style Stainless Steel Straw Bottle12 ozCompare side by side
Kelso Insulated Tumbler, 12 oz.: questions answered
From Zak Designs's published specs, last checked 2026-11-11.
Is there lead in the Zak Designs Kelso Insulated Tumbler, 12 oz.?
The maker doesn't make a lead statement on its product page.
Still wondering? Write to us at hello@cribpicks.com and we'll look it up.
More insulated and stainless kids' cups
- LaloStainless Toddler Cup$1712 oz$17.99
- CamelBakEddy+ Kids 12 oz Bottle, Insulated Stainless Steel12 oz10 hr cold
- MunchkinStay Cool Water Bottle$912 oz$9.99
- ReduceColdee 14 oz Kids Tumbler14 oz18 hr cold
- Dr. Brown'sMilestones Insulated Straw Cup, 2-Pack10 oz
- PuraKiki 9oz Insulated Kiddo Straw Bottle9 oz12 hr cold
Where these specs come from
Last checked 2026-11-11. Spot something wrong? Tell us. Read our editorial and safety policy and corrections.