I just received my first Silipint and I have to say that out of the box I am impressed. This is a flexible pint glass made out of silicon. It will not shatter, grips well in the hand and keeps a pretty even temperature regardless of the contents. Because silicon has such a high melting point you could reasonably bake in this thing but more practically it is dishwasher safe.
They also make cups in old fashioned, shots and various other sizes that I may pick up at another date.
One of my big complaints about the rejigger was the bad seal the device had with a standard pint glass. The silipint flexes and conforms to even the most oddly shaped opening and makes for a much better vessel for the rejigger.
The flexible rim also allows you to pinch it slightly and create a more functional pour spout.
On the downside, the matte finish is slightly static friendly which in turn attracts dust, hair and all manner of other bits to the outside and occasionally inside of the cup. Rinsing is easy but the grippy exterior means drying is a little fussy. As you can see in the photo it holds onto water on the outside as well. Even just sitting on a shelf the cup will pull in some dust and so must be washed before use every time. A single trip through the dishwasher shows that it is safe to wash but if you’re using a powdered detergent it can leave quite a bit of residue which will require another rinse before using again.
There were no changes in flavor and it appears to treat carbonation in a pretty similar fashion to glass. I love the item but recognize that you’re trading off fragile break-ability for fussy dust attraction.