Youda Stainless Steel Double Walled Cups (4 Piece)+Silicone Coaster(4 Piece) Stackable, Brushed Metal Drinking Glasses, Coffee Cup/Tea Cup/Chilling Beer Glasses, For Home&Outdoor, 6 oz(175ml)

But quite expensive.

As described and fitted what I needed.Not tested the double-walledness of these, but they fit perfectly in the Hex3D goblets I printed

I bought for my son because I didn't want to use glass. I washed twice and gave him some water he held it around his mouth for a minute or two and he had a black stain all around his mouth I then washed it again and soaked still wouldn't come off all four cups!

I initially got them as unbreakable cups for my espresso machine, it tends to vibrate some times. I quickly realized how much I like them for normal use as well. At this point I mostly use them for espresso, tea and juice. I bet they are amazing for hiking trips and camping due to material and how compact they are when stacked.

Pretty pleased with these, good for hot and cold drinks, great for little ones. Only wish they did them bigger for bigger drinks. Also the coasters are a great addition, but very seasonal (being a snow flake). A more universal coaster would be better I think

All four cups came with black stains and spots on the rims. I am very dissapointed with the quality. The reason why I am giving 2 stars is that the functionality of the product that the cups collapse so it saves so much space in bag.