The Calculated Chemist
Fabric Handle Strap Add-On for Flask Bottle — 4 Color Options | Replacement Strap | The Calculated Chemist
Give your flask a fresh new look! This Fabric Handle Strap Add-On is the perfect upgrade for your stainless steel flask bottle from The Calculated Chemist. Made from soft, durable polyester, these straps make your bottle easier and more comfortable to carry while adding a pop of personality.
Swap out your standard black handle and choose from 4 stylish colors to match your vibe, your outfit, or your favorite flask color. Perfect for everyday use, gifting, or customizing your bottle for work, school, or the lab.
✨ Why you’ll love it:
• Soft + strong polyester fabric
• Comfortable grip for daily carry
• Easy to attach — replaces your standard handle
• Available in 4 unique color options
• A fun and affordable way to personalize your flask
Make your flask uniquely yours — a small upgrade that makes a big difference!
Product information
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
COMING SPRING 2025
Introducing our latest innovation- a stainless-steel, double-wall vacuum insulated tumbler. Available for pre-sale purchases.