SUNWILLSUNWILLInsulated drinkware for every day, hot side and cold side

What SUNWILL is for

We make stainless steel cups and bottles with double-wall vacuum insulation. We make a few shapes instead of dozens, and we keep working on the details: a slider that lifts off to wash, a powder coat that doesn't peel, a handle on the mugs and straw tumblers. The point is simple. Your coffee should still be hot after the school run. Your water should still be cold after a long afternoon in the sun. The outside doesn't sweat, so no wet ring on the desk.

We make 64 pieces across 6 departments, in sizes from 14 oz to 30 oz. They come in 40 powder-coated finishes. Hot drinks stay hot 3 to 12 hours. Cold drinks stay cold 9 to 24 hours. 31 of them fit a standard car cup holder. The sliding lids are splash-resistant, not leak-proof. Don't toss one in a tote with a laptop. If you need a bottle that seals, choose a water bottle with the screw-on chug lid.

Who this is for: commuters, people on job sites, parents packing school bags, long afternoons outside. We recommend hand washing, even on pieces we state as dishwasher safe. The lid, gasket removed, is dishwasher safe up to 155 °F.

We keep the range small because getting a shape right takes time. We have redesigned the lid more often than the body. The slider you can lift off two tabs and wash is our answer to the smell complaints that come with lids you cannot take apart. That one detail took years, and we would rather do that four times well than ship twenty designs that almost work.

When we decide what to make next, we look at the gaps we run into ourselves. We drink from our own pieces in the car, at a desk, on a trail. If we keep wishing for a certain shape, we figure there are others who wish for it too.

That is how the straw tumbler grew out of the travel tumbler: we wanted something that handled a cold drink all afternoon, fit a cup holder, and gave you a handle you could grab without looking. We did not rush it. We worked on the seal and the straw fit until the lid could ride in a bag without leaking. The next shape will come the same way, when the problem is clear and the team is annoyed enough to solve it.

A cup is judged at four in the afternoon, when the coffee from eight is still warm or is not.

We list four things on every product page: capacity, steel, lid, and the hours as we state them. Capacity tells you whether a tumbler fits your morning routine or a long drive. The steel is 18/8 food‑grade stainless, the same material across all 56 vacuum‑insulated pieces. The lid is where the design really shows. Our sliding lids come apart for cleaning, but they are splash‑resistant, not leak‑proof. Straw tumblers and bottles use lids we call leak‑proof.

The slider lifts off two tabs, so you can clean every crevice. That matters if you use the tumbler for coffee every day. And the hours give you a realistic range: hot from 3 to 12 hours, cold from 9 to 24 hours, depending on the piece. We don't publish a lab chart, just the range we're confident in. The hours are based on the lid being on, at room temperature. A tumbler left open cools faster.

You can browse by department. We make 15 coffee mugs (14 oz, hot 3+ hours), 11 travel tumblers (20 oz, hot 6+ hours), 13 straw tumblers (20/30 oz, cold 24+ hours), and 9 water bottles (22 oz, hot 12+ hours). Gift sets pack two or four tumblers together. Replacement lids live in their own department.

We make cups for everyday use, not laboratory instruments or survival gear. Our double-wall insulation keeps drinks hot or cold for hours, but if you need a precise temperature for medical reasons or a sealed flask that can tumble around in a rucksack, our pieces are the wrong tool.

We state splash resistance, not full leak-proofing, on the 42 pieces with sliding lids. That lid will save your shirt from a coffee slosh during a commute, but it will not hold liquid if the cup tips over in a bag. If you need a bottle you can toss into a backpack and forget, look at our 9 pieces with screw-on chug lids instead.

We also do not make dishwasher furniture. Hand washing is what we recommend for the body and the gasket. The lid, with the gasket removed, can go on the top rack up to 155 °F, but the powder coat and vacuum seal stay happier with a sink and a soft sponge. If you want gear that goes straight from the cup holder into the machine every night, our cups will not love you back.

They are also not a blank canvas for us to personalize. We do not engrave or monogram anything. Someone else with a laser can do that, but we just make the cup and the color. If you need a name etched on the side, you will need to arrange that separately. Our pieces suit people who want a straightforward, well-made tumbler or mug and who do not mind a little care in exchange for a finish that lasts.

Our catalog has about 64 pieces across 6 shapes. We do not try to make a dozen different styles. We would rather spend a year improving a lid than add a shape we will not use ourselves.

Every change starts the same way. Someone on the team runs into a real annoyance. A lid that trapped coffee oils. A 30 oz tumbler that would not fit a narrow cup holder. A powder coat that looked fine out of the box but dulled after a season of hand washing. We take that one complaint and we chase it until the next batch is better.

The sliding lid we make now is the fourth version. Earlier ones worked until they got dirty, and then they were hard to clean. We changed the tab design so the whole slider comes off without a tool. It is still splash resistant, not leak-proof, and we say so. But it takes ten seconds to rinse.

We are working on a few things at the moment, and none of them are far enough along to promise. A better seal for the straw lid. A finish that handles keys and zippers a little more gracefully. A handle shape that is easier to grab with gloves on. Some of these will make it into the catalog. Some will not.

We decide by using the samples. We pour hot coffee into them on Monday morning and cold water on a July hike. If a piece holds temperature the way we claim and cleans up without a fight, it stays. If it annoys us, we go back to the drawing. That is the whole process.