Owala SmoothSip Slider Insulated Tumbler (20 oz) Review
A coffee that is still hot at the mid-morning stop is a real luxury on a cold start. The Owala keeps it hot, but it is a heavy, wide cup rather than a bike bottle.
The verdictA good insulated cup that a bike was not designed around. Pack it, do not cage it.
The Amazon US listing, sold by Amazon, is the 20 oz SmoothSip Slider without a handle: double-wall stainless steel, a lid with a sliding spout, 12.64 oz (358 g) and 8.3 by 21.6 cm. Owala claims 6 hours hot and 24 hours cold and calls the lid leak-proof, and the lid is dishwasher-safe while the cup is hand-wash only. It comes with Owala's limited lifetime warranty.
On a bike the numbers that matter are width and weight. The listing makes no claim about bottle cages, and at 8.3 cm it is wider than the roughly 7.4 cm bottle most cages are built around, so plan on a frame bag, a stem bag or an oversize cage. At 358 g it weighs more than three times the TOAKS 750 ml titanium pot, which is the price of keeping coffee hot until the second stop.
Owner reports stood at 4.6 stars across 15,220 ratings in October 2026. Owners describe it as spill-proof once the lid is clicked fully home and a little hard to clean, and one owner reported a leak after three months. Carry it upright in a bag until you trust your lid.
What works
- 6 hours hot by Owala's figure
- Sliding spout limits splashes
- Dishwasher-safe lid
What doesn't
- 358 g, heavy for a cup
- 8.3 cm wide, too wide for most cages
- Cup is hand-wash only
Buy it if
- Cold Starts: Keeps a hot drink hot until the first stop.
- Bag Carry: Rides upright in a frame or stem bag.
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