The Calculated Chemist

Flask Stoppers (replacements)

$8.00 Sold out

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2 Black Silicone Stoppers

Product variants

Frequently Asked Questions

What is the capacity of the Beaker Drink Tumbler?

Our Beaker Drink Tumbler holds 500 mL (16.9 oz), perfect for coffee, cocktails, or your favorite beverages.

Is the tumbler made of real laboratory glass?

Yes! It’s crafted from borosilicate glass—the same durable, thermal-shock resistant material used in scientific labs.

Can it go in the dishwasher?

Absolutely. The tumbler is dishwasher-safe for easy cleaning.

Is this safe for hot and cold drinks?

Yes, borosilicate glass handles both hot and cold liquids without cracking or shattering.

Does it come with a lid or straw?

Yes, this product comes with a sustainable bamboo wood lid and food-grade silicone straws.

Flask Drink Tumbler

Introducing our latest innovation- a stainless-steel, double-wall vacuum insulated tumbler. Available for pre-sale purchases.