About SUNWILL
SUNWILL is a drinkware brand that sells insulated tumblers, coffee mugs, water bottles, and wine tumblers direct to consumers through its own storefront at sunwillbiz.com, alongside a wide catalog of colorways and replacement parts on Amazon. The lineup runs from 12-ounce skinny tumblers up through 32-ounce water bottles, all built around the same double-wall vacuum-insulated construction: 18/10 stainless steel bodies with a chip-resistant, powder-coated exterior finish and BPA-free lids. SUNWILL backs its products with a straightforward money-back guarantee, stating on its own site that it is "happy to provide money back if you are not fully satisfied with the tumbler."
That combination of real insulated performance at a low price point is exactly what stood out in our own testing. The SUNWILL Travel Coffee Tumbler 20 oz is one of the top picks in our travel coffee mug testing: it sits at the bottom of the field on price and has still amassed more than 28,000 ratings on Amazon at a 4.5-star average, a review base most budget drinkware never comes close to. It's proof that a specialist tumbler brand with a narrow, focused catalog can out-value the premium names on the fundamentals -- genuine vacuum insulation and a durable finish -- without the markup.
Brand website: sunwillbiz.com
What SUNWILL makes
SUNWILL's range runs wider than the products we review. The lines we know best from our own testing are marked with a star:
Travel Coffee Tumblers (20oz & 24oz)
double-wall vacuum-insulated, powder-coated stainless steel tumblers with sliding lids -- featured on Brew Gazette — featured on Brew Gazette
Coffee Mugs (14oz)
insulated camping-style mugs with sliding lids, sold individually or in sets
Skinny Tumblers with Straw (12oz & 20oz)
slim-profile insulated tumblers with straw lids in a wider color range
Water Bottles (18oz, 22oz & 32oz)
vacuum-insulated stainless steel bottles
Wine Tumblers
stemless insulated stainless steel wine and cocktail tumblers, single and multi-pack
Replacement Lids & Accessories
spare sliding and straw lids sold separately for existing tumblers
Why we recognized SUNWILL
The Brew Gazette Top Brand recognition isn't paid for and can't be applied for. We award it to the brands whose products consistently stand out in our hands-on category reviews. SUNWILL earned it on the strength of the products below, evaluated the same way every product on this site is: bought, brewed with daily, and judged on what lands in the cup.
SUNWILL products we rated highly
SUNWILL Travel Coffee Tumbler 20 oz
It's the least expensive mug in our travel coffee mug roundup, yet with more than 28,000 reviews at 4.5 stars it still carries a serious, proven track record -- the definition of a low-risk buy. The double-wall vacuum insulation genuinely works, keeping coffee hot for around five to six hours, and the powder-coated exterior resists chips and fingerprints for a grip and finish that feels well above its tier. The slide-open lid is spill-resistant rather than fully leakproof, so it's the mug for a cupholder or a desk rather than the one to toss sideways in a bag.
Read the 10 Best Travel Coffee Mugs of 2026 guide →What earned SUNWILL the recognition
- One of our top travel coffee mug picks, tested head-to-head against YETI, Fellow, Contigo, and Zojirushi.
- More than 28,000 Amazon ratings at a 4.5-star average for the featured 20oz tumbler -- an unusually deep, proven track record for the most affordable mug in the roundup.
- Genuine double-wall vacuum insulation that holds coffee hot for roughly five to six hours, real thermal performance at a price point where most rivals cut corners.
- 18/10 stainless steel construction with a chip- and fingerprint-resistant powder-coated finish and BPA-free lid, backed by SUNWILL's own money-back satisfaction guarantee.
- A focused drinkware catalog -- tumblers, mugs, water bottles, and wine tumblers spanning 12oz to 32oz -- rather than a general houseware line that added cups as an afterthought.