The BPA-free reusable cup is available complimentary to first-year students with dining plans. It’s the perfect vessel for a cold beverage and is loved by Instagram influencers.
It’s also the best option if you love Starbucks, where bringing in your own mug lands you a 10-cent discount and 25 stars, which can add up to free drinks over time.
Keeps Drinks Cold
The best insulated tumblers are made of stainless steel, so they’ll keep both hot and cold drinks at their optimal temperatures for extended periods. They have double-wall construction that creates a vacuum inside the bottle to reduce heat transfer and cold air loss. They’re durable enough to handle rough use, and they fit in car cup holders for travel.
For coffee, look for a tumbler with a ceramic interior to prevent any metallic taste. The Fellow Carter mug is an excellent option, and it has a double-wall vacuum that keeps drinks cold for up to 15 hours. The tumbler also has a locking lid for one-handed drinking and fits in most standard car cup holders.
Glass options like the Tronco and Ello Devon mugs have decent insulation for their size, but they don’t perform as well for keeping drinks cold. The Hitslam wine tumbler is another glass option with poor insulation, as it has a low shape, thin plastic lid, and non-closing straw opening.
Keeps Drinks Hot
The insulated stainless steel design of this tumbler keeps drinks hot or cold for hours. Its sleek body harks back to enamel camp mugs, and it comes in multiple colors. During our testing, it kept coffee and tea at the perfect temperature for long periods of time.
Glass tea mugs can be heavy and difficult to carry around, but this tumbler solves the problem with its convenient grip and easy-to-use lid. It also eliminates the risk of shattered glass, which is a major concern at the beach or when camping.
Vacuum insulation is another important feature of this tumbler, which removes air from between its two layers to keep drinks at their ideal temperatures. This tumbler can even be used to store hot foods, like oatmeal or soup.
Purchasing a reusable tumbler or travel mug is an investment that will save you money in the long run. The cost of purchasing disposable cups can add up over time, especially if you are a frequent customer at coffee shops or other beverage establishments.
Most retail chains and coffee shops offer a discount when customers bring their own cup or mug, which is a great way to reduce waste and make your favorite drinks even more affordable!
Tumblers and mugs are also more fashionable than coolers packed with ice and can make an excellent choice for summer picnics. They can also be used as party favors and can help to promote brand awareness. If you have a corporate event planned, consider handing out a customized stainless steel tumbler or mug to all of your employees. It is a great way to show your company’s commitment to sustainability and will be appreciated by those who receive it.
Saves the Environment
The excessive use of paper and plastic cups contributes to environmental pollution . Plastic waste is one of the most serious issues in the world. Every year, it causes damage to the environment and harms living beings. Hundreds of thousands of sea animals die every year because of stray plastic. 
Reusable cups cut down on the overproduction of some of these single-use materials. They also take less energy to wash than a disposable cup.
Previous studies have established a strong link between green university initiatives, perceived behavioral control (PBC), subjective norms (SN) and intention to use environmentally friendly products. However, they have ignored the role of moral norms. This study fills the gap by incorporating GUIs and moral norms in an extended theory of planned behavior model and investigating the role they play in students’ intentions to use reusable drinking cups for environmental sustainability. This is a valuable contribution to the field of sustainable research.