Bobber Tumbler

A stainless steel tumbler for the desk, the car, the morning walk — coffee stays hot, ice doesn't melt, and it fits any cup-holder.

A tumbler is the cup you reach for every day, and most of them are doing it wrong — single-wall ceramics cool fast, plastic ones leach taste, sweaty outers ruin desk papers. The bobber Tumbler is double-wall vacuum-insulated 18/8 steel with a spill-resistant slide lid. Coffee at the start of a meeting is still coffee at the end of it.

Heat retention by size

• 350ml: hot up to 6 hours, cold up to 12 hours
• 500ml: hot up to 8 hours, cold up to 16 hours

Tech features

• Insulated for hours, not minutes: see per-size retention above.
• Spill-resistant slide-top lid: Fast sips, no spills if you knock it.
• Standard cup-holder fit: Works in cars, bikes, baby strollers.
• Sweat-free outer: No condensation on the desk, no slip in the hand.
• Pure-taste interior: No coatings, no plastic on the drink side.

Materials

• Body: 18/8 food-grade stainless steel.
• Lid: BPA-free polypropylene, removable for cleaning.
• Seal: Food-grade silicone.
• Care: Hand-wash body. Lid components rinse clean.

Specs

• Capacities: 350ml, 500ml
• Construction: Double-wall vacuum-insulated
• Heat retention: 350ml — 6h hot / 12h cold · 500ml — 8h hot / 16h cold
• Warranty: 5-year manufacturer warranty
• Awards: Red Dot, iF Design, Good Design

About bobber

Stainless steel drinkware made to actually work — long-life insulation, no plastic on the contents side, and design awards from MoMA to Red Dot.