Karter Scientific 500ml ガラスラウンドメディアストレージボトル GL45スクリューキャップ付き ホウケイ酸ガラス 251M8 (2パック)

These are great for batching martinis to put in freezer. There are foam sleeves available that will keep them cold out of the freezer for a while. Nice way to reduce the stress of mixing drinks.

Perfect size for mixing and storing my coffee brew water buffers and concentrates. Wide mouth that seals tightly with no leaks. Fits neatly in the back of the fridge. Clearly labelled measurement markings. Good value.

I used them for pouring agar. Solid construction and no issues when used in an autoclave. However, when pouring the agar it drips down the side of the bottle and gets messy. I’ve never had this issue from using a pedialyte bottle. These are going into the cupboard until I find a use for them.

Hit and miss. Both the 500ML bottles I received leak. Also, I'm not sure it's borosilicate. Others have found it's not. To test warm up in hot tap water, then rapidly dunk in cold water. If it cracks, it's not.

As they should be. Clean and solid