Atlas (株式会社アトラス), a Tokyo-based manufacturer of stainless-steel tableware and kitchenware, has launched the SLOOP Straw Large-Capacity Tumbler on June 23, 2026. The three-size lineup — 800 mL, 950 mL, and 1150 mL — is designed to make staying hydrated as smooth and uninterrupted as possible.
Keeps Ice Cold for Hours
The double-wall vacuum insulation holds the temperature at 6°C or below after one hour across all sizes, so ice melts slowly and drinks stay refreshingly cold to the last sip without watering down.
Insulated Lid for Added Cold Retention
The lid itself contains insulating material, reducing heat transfer through the opening and helping to maintain coldness even longer.
Straw Adjustable to Any Position
Unlike most straw tumblers where the straw position is fixed by how the lid is tightened, this tumbler uses a screw-free lid design that allows the straw to be rotated to any angle. Users can set the straw exactly where it is most comfortable for their dominant hand, enabling natural, fluid drinking without switching hands.
Wide Straw for Big Gulps
The wide straw delivers a high flow rate, making it possible to take a satisfying gulp in a single draw. It works equally well with sports drinks, making the tumbler practical during warm days or gym sessions. The straw is made from a saturated polyester resin with glass-like clarity and strong resistance to breakage, odors, and staining.
Straw Holder Included
Removing the thumb rest on the upper part of the handle converts it into a straw holder, so there is always a place to keep the straw when not in use or during transport. The handle grip can also be removed for thorough cleaning inside the holder. (950 mL and 1150 mL only)
Thumb Rest Doubles as a Straw Port Cap
The detached thumb rest can be used as a dedicated cap to cover the straw opening, keeping out dust and debris while on the move. It also reduces the risk of spilling if the tumbler is knocked over, protecting desks and car interiors. (950 mL and 1150 mL only)
Note: the tumbler is not fully watertight.
Jug-Style Handle
The handle is sized to fit four fingers comfortably, giving a secure, jug-like grip even when the tumbler is full. Its smooth, rounded contours ensure comfortable contact with the hand. (950 mL and 1150 mL only)
Fits Standard Car Cup Holders
The body tapers from the middle toward the base, allowing the tumbler to fit into most car cup holders despite its generous capacity. (Compatibility varies by vehicle.)
Large Capacity Cuts Down on Refills
The generous volume reduces how often users need to refill during desk work or study sessions, helping maintain focus without unnecessary interruptions.
Wide Opening for Easy Filling and Cleaning
The approximately 89 mm diameter opening is wide enough to fit a hand all the way to the bottom for cleaning, and allows ice and drinks to be poured in smoothly — no bottle brush required.
Easy to Clean Throughout
All parts are detachable for thorough cleaning of every corner. A thin straw brush is recommended for the straw (not included).
Compatible with Carbonated and Sports Drinks
The tumbler handles sports drinks, carbonated beverages, milk-based drinks, and drinks with fruit pulp, making it versatile for everyday use — from a desk refreshment to post-workout replenishment.
Scratch-Resistant Powder Coating
The exterior is finished with a scratch-resistant powder coat that is also non-slip to hold. The matte texture gives the tumbler a premium feel while hiding minor scuffs from everyday use.
2-Way Drinking: Straw or Direct
The tumbler supports both straw drinking and direct drinking, so users can choose based on the situation or preference. Hot beverages can be enjoyed when drinking directly, making the tumbler usable year-round.
Size-Specific Shapes for Different Needs
The handle version offers a firm single-handed grip suitable for sports and outdoor activities. The handleless version has a clean, low-profile silhouette that fits neatly on a desk without getting in the way.
Product Specifications
SLOOP Straw Large-Capacity Tumbler
| Item | Details |
|---|---|
| Model numbers | AQST-800 / AQST-950 / AQST-1150 |
| Capacity | Approx. 800 mL / 950 mL / 1150 mL |
| Colors (800 mL) | Charcoal / Snow White / Pink / Lavender / Blue |
| Colors (950 mL) | Charcoal / Snow White / Pink / Lavender / Soda / Blue |
| Colors (1150 mL) | Charcoal / Snow White / Blue |
| Cold retention (1 hour) | 6°C or below (all sizes) |
| Weight | Approx. 380 g / 475 g / 525 g |
| Dimensions (W×D×H) | 101×101×250 mm / 146×101×282 mm / 146×101×314 mm |
| Price | Open pricing |
