BEST USE: Backpacking & Camping
VOLUME: 11.8 fl oz | 350ml
WEIGHT: 2.4 oz | 68 g
MATERIAL(S): Flexible food grade silicone
Shipping & Returns
Our warehouse is actively shipping orders from 8am to 1pm MST Monday through Friday. Most orders ship in one business day, but the transit time can take up to 7 days, depending on your distance from Boulder, Colorado.
2nd Day and Next Day Air orders will ship same day if placed by 1pm MST, Monday-Friday (except holidays).
All orders are eligible for fast and easy returns within 60 days of purchase.
For more details, please check out our Help Center
The Cool Grip X-Tumbler was built to keep your hands cool when drinking hot liquids. This is made possible by the Cool Grip unique design that reduces surface temperatures and heat transfer, allowing you to hold your hot tea and coffee firmly without burning your fingers. In addition, a rigid ring made of glass-reinforced nylon keeps the rim of this medium-sized 12 oz /350 ml tumbler stable. All materials are BPA-free and certified to EU food-grade standards.
- Collapsible tumbler with heat protective fins
- Folds flat to a 5/8” / 15mm thick disc
- Heat resistant, BPA-free, food-grade silicone
- Calibrated as a measuring cup
- Nests with other X-Series products
Like all materials used in Sea to Summit tableware products, the heat-resistant silicone used in the X-Series is BPA-free. It is certified to both EU and FDA food grade standards, which signifies very low absorption of external materials. It is also heat resistant to 300ºF and doesn't crack in the cold
These products are all Bisphenol-a (BPA) free, which means you can have peace of mind while eating and drinking from these products.
Best UseBackpacking, Camping, Overland, Bike Touring
Material(s)Flexible food grade silicone
SpecialDishwasher Safe | Not Microwave Compatible
Frequently Asked questions
Is it safe to use with hot liquids?
Yes, the innovative Cool Grip construction uses specially-designed fins to keep your fingers protected from the heat of your drink.
Is it dishwasher-safe?
Yes, this cutlery can be washed in the dishwasher--top rack only.
Is it compatible with other X-Products?
Yes, our X-Series products work with each other and are designed with common dimensions to neatly nest together and reduce storage space.
Can it be used as a measuring cup?
Yes, it features measurement increments on the inside of the mug.