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GSI Infinity Insulated Mug

3 reviews
5-star:   1
4-star:   1
3-star:   1
2-star:   0
1-star:   0

Overall it's not a bad mug, it's just not perfect.

Rating: rated 3 of 5 stars
Source: bought it new
Price Paid: $10.67


Overall it's not a bad mug, it's just not perfect.


  • Lightweight
  • Capacity


  • Handle
  • Lip too small

Was purchased as a lightweight mug for day-hiking and backpacking use for a coffee addict.

Pros: lightweight, lid fits securely but isn't impossible to get on and off, outer insulated sleeve slides off/on easily, size of the mug isn't too big around for my stubby fingers, volume it holds is perfect, relatively easy to clean plastic mug and lid (haven't washed sleeve).

Cons: handle is too big/floppy to safely use as a true mug handle, you always have to slurp coffee off of the portion of the flip down lid that actually seats into the hole or it will drip on your nose when you tip the cup to drink, actual lip of mug could be a bit taller — I envision the edge of the neoprene sleeve getting gross in time.

Overall it's not a bad mug, it's just not perfect.

3 out of 5 stars in my opinion.


The GSI Infinity Insulated Mug is my go-to backpacking…

Rating: rated 4 of 5 stars
Source: bought it new
Price Paid: $5.95


The GSI Infinity Insulated Mug is my go-to backpacking cup. It is lightweight, sturdy, insulated, and has a lid. I use it for hot chocolate, backcountry cocktails, and Propel water mixes.


  • Inexpensive
  • Lightweight
  • Sturdy
  • Nice size
  • Insulates drinks well


  • Lid is difficult to remove

The GSI Infinity mug is a 3.2 ounce cup that holds 17ounces of liquid. It has an insulated coozie on the outside of it that both insulates the liquid and keeps your hand from getting hot or cold.

It is made from BPA-free polypropylene. It does not absorb odors or colors and it is dishwasher safe.


Another nice feature of the Infinity mug is that it has a Sip it lid that has a small opening on the side of the lid. I found the size of the opening and its location to be convenient. It helps further insulate your beverage and serves as a splash guard. 


The only thing that I do not like about the cup is that the lid is difficult to remove.


I have had this mug for about two years now and it has been used on every trip I've been on since it was purchased. It is very durable and sturdy. I still can not justify a need for any other mug. This one has met all of my needs.

Overall: If you are looking for a lightweight, functional, inexpensive backcountry mug, this is a great choice.


Lightweight, keeps drinks hot, fun to use. Mug in…

Rating: rated 5 of 5 stars
Source: bought it new
Price Paid: $9.95


Lightweight, keeps drinks hot, fun to use.


  • Lightweight
  • Good insulation—keeps the brews HOT
  • Webbing handle is nice touch


  • Lid over mouth hole is not tight

Mug in use at the Hoh Rainforest, WA

I ordered this item from Amazon, thinking I was getting the Infinity mug that had no handle. Imagine my surprise and delight when I got this model! Not only was it better-looking, it had a webbing handle!

This mug is my new favorite (my previous being an old North Face insulated mug that I got at a product seminar when I worked for an outdoor retailer in the early '90s). It's light, the insulation is fantastic, and it looks just the right amount of outdoor stylish. The lid fits tight (another reviewer thought this was not a good thing, but with a full load of hot beverage, believe me—you want that lid tight!). My only complaint was that the lid over the mouth hole did not shut tight, so if you knock the mug over, it would probably spill.

I love the fact that the mug does not retain odors, which makes it nice to switch between tea and coffee with no residual taste. That's because it's made of non-leaching, clear polypropolene that is also 100% recyclable.

The mug has an insulated sleeve that works very well; I've had a steaming mug of coffee for a long time after pouring. It also has a collapsable webbing handle, which is a very nice touch.

The 3.5 oz. weight of the mug holds a generous 17 oz. of liquid.

Well done, GSI, well done!

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GSI Infinity Insulated Mug

currently retails for:
MSRP: $6.95

where to buy:


Weight 3.2 oz
Dimensions 3.70 in x 3.70 in x 4.40 in
Materials Clear Polypropylene