Will these fit a metal straw from a beast 30oz tumbler ???

These fit a 3/8” straw so measure the width of your metal straw and you’ll probably get a good indication. Ps: I used metal straw for awhile, but read an article about a person who fell down while drinking using a metal straw and was severely injured as the straw was forced into his sinus cavity/brain area. Just FYI

Can these on tumblr straws?

I don't understand the question... But... I use for the plastic straws I buy for my grandson's cups.. plus the large reusable plastic straws that come with large glasses from Starbucks, PLUS my stainless steel straws that come with my large stainless travel mugs. I cannot stand the idea of dust and anything else that might drift into my drink cups. These are a must. I was down to two and one of those was broken. I was so happy to find these. I am so pleased I am purchasing for my family. I hope this helps.

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Diximus 10-pack Black Caps Drinking Straw Covers - Straw Caps

Product ID: 112139656

Details

Brand
Diximus
Color
Black
Manufacturer
Diximus
Number of Items
10
Size
10 Count (Pack
Special Feature
Reusable

🔄10 reusable caps

♻️Eco-friendly plastic

⚙️Fits 3/8" straws

Description

Sip Smart, Live Bold! 🥤

DURABLE REUSABLE - Crafted from high-quality plastic for long-lasting use.
ECO CONSCIOUS CHOICE - Reduce waste with these reusable straw caps, perfect for the environmentally aware.
CONVENIENT PRACTICAL - Easily attach and detach, keeping your straws clean and ready to use.
ELEVATE YOUR SIPPING GAME - Transform your drinking experience with these sleek black caps.
PERFECT FIT FOR ACTIVE LIFESTYLES - Designed for 3/8" diameter straws, ideal for sports bottles.

The Diximus 10-pack Black Caps Drinking Straw Caps are designed to fit 3/8" diameter straws, making them perfect for various sports bottles. Made from durable plastic, these caps are reusable and easy to attach or detach, ensuring a clean and convenient drinking experience. Ideal for eco-conscious consumers, this pack of 10 offers a stylish solution to enhance your hydration routine.

Specifications

Asin	B079H2NDSB
Best Sellers Rank	#690,305 in Health & Household (See Top 100 in Health & Household) #3,231 in Disposable Drinking Straws
Brand Name	Diximus
Color	Black
Customer Reviews	3.7 3.7 out of 5 stars (1,093) 3.7 out of 5 stars
Manufacturer Part Number	8541824913
Model Number	8541824913
Number Of Items	10
Other Special Features Of The Product	Reusable
Size	10 Count (Pack of 1)
Unit Count	10 Count
Upc	746264137204

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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The MOLLE sheath is of exceptional quality. Very happy with my purchase.

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