myColdCup Water Bottle Ice Pack, Reusable Ice Stick. BPA-free. Won't Dilute Drinks. Convenient and Durable. Set of 6 (2oz)

I had this in my hydroflask and it kept my water cold the whole day. It was fairly hot that day 85-90 degrees throughout the day.

Did not like the plastic taste in my water. It may be fine for drinks besides water.

I feel like they changed the taste of water.

Great product!

This product does exactly what they claim. I live in the Houston area and often work outside. Having this product work well is critically important to my health.

Horrible product. Do not stay cold. One of mine even leaked out. Threw away after one use. Don't waste your money.

Keeps my insulin chilled

Great for keeping drinks cold