Quick answer
To use your Kelso Tumbler for hot or cold drinks, preheat or precool the tumbler first, fill it, and secure the leak-proof lid. The silicone valve stops spills, so it works well for both hot coffee and iced water.
Why temperature prep matters
The Kelso Tumbler is double-wall insulated, but extreme temperature shifts can reduce effectiveness. Preheating or precooling the tumbler before filling helps maintain your drink's temperature longer.
For hot drinks, the external surface may feel warm after a while—this is normal for most insulated tumblers. The silicone spout valve is not designed for boiling liquids, so let hot coffee or tea cool slightly before pouring.
Leak-proof design limitations
The Kelso Tumbler's valve stops water from flowing when no one is drinking, but it is not airtight for carbonated beverages. Avoid using it for soda or sparkling water, as pressure can build up and cause leaks.
Steps to use your Kelso Tumbler for hot and cold drinks
- Preheat for hot drinks: Fill the tumbler with hot tap water, let it sit for 2 minutes, then empty it. This warms the interior so your hot coffee or tea stays hot longer. Skipping preheat can cause your drink to cool down 10-15% faster.
- Precool for cold drinks: Fill the tumbler with ice cubes and cold water, let it sit for 2 minutes, then empty it. This chills the interior so your iced water or cold juice stays cold longer. Without precooling, ice may melt faster and dilute your drink.
- Fill and seal: Pour your drink into the prepped tumbler, leaving about half an inch of space at the top. Screw the lid on tightly until you hear a click. The silicone valve will prevent leaks when tipped over. Overfilling can cause spills when the lid is secured, especially with hot liquids.
- Drink safely: Sip through the spout. For hot drinks, test the temperature first—the insulation keeps the exterior cool, but the liquid inside can still be very hot. For cold drinks, the spout works well for small sips without dripping. Do not microwave or freeze the tumbler, as the silicone valve may be damaged.
- Clean after each use: Hand wash the tumbler and lid with mild soap and warm water. Use a bottle brush to reach the bottom. Rinse thoroughly and air dry upside down. Avoid dishwashers; high heat can warp the silicone valve over time.
Product facts
-
Kelso Tumbler, 15 oz. (2 Pack): The silicone sipper spout has a built-in valve that stops water from flowing when no one is drinking. This makes the tumbler safe for car rides and daycare, but you should avoid carbonated drinks to prevent pressure buildup.
Kelso Tumbler, 15 oz. (2 Pack)
