Well I do not think so according to the title of the product - TOSSWARE 9oz Flute - recyclable champagne plastic cup.

Are they sturdy enough or will they tip over easily?

Whike they are light, I think they were pretty sturdy. Of course when you fill them with liquid it will add stability because of weight. With that said, no they didn't tip over easily. I used them for mimosas at an brunch where children were going to be present so I felt safe. I would order another pack for future. One thing to note is you can keep them but if you decide to wash them just don't put them in your dishwasher or they will heat shrink! Hope this helps :)

Can you twll me the Dimension of one glass

5.75 inches high. Max width is 2.125 inches. We love them. Can clean in dishwasher, but TURN OFF THE DRY CYCLE or the "glass" will melt.

What is the size of the opening at the top of the glass/tossware? (preferably the inside diameter)

The inside diameter is 1-11/16”

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9oz Flute

Product ID: 17971547

Details

Brand
TOSSWARE
Capacity
9 Fluid Ounces
Color
Clear
Material
Polyethylene
Special Feature
Stackable Rim

🥂9oz capacity for perfect pours

🧊Unbreakable crystal-clear PET plastic

♻️Made from 1 recycled plastic bottle each

€ 55.02

Duties & taxes included

In stock

Sold byAmazon PortugalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🥂 Toast in style, save the planet, and never miss a clink!

SMART STACK STORE - Patented Pop ’n Lock design for effortless stacking and space-saving storage.
SMOOTH SIP EXPERIENCE - Rounded rim engineered for a flawless, refined drinking feel every time.
ECO CHIC RESPONSIBLE - Crafted from recycled PET and 100% BPA-free for guilt-free sophistication.
ELEVATE EVERY CELEBRATION - Crystal-clear elegance meets unbreakable durability—toast without worry.
VERSATILE PARTY ESSENTIAL - Ideal for champagne, mimosas, rosé, and sparkling cocktails at any event.

TOSSWARE POP 9oz Flutes combine premium, crystal-clear PET plastic with eco-conscious design—each glass is unbreakable, BPA-free, and made from recycled materials. Featuring a patented rounded rim for smooth sipping and a Pop ’n Lock stackable system, these 12-count flutes are perfect for upscale disposable drinkware at birthdays, bridal showers, and outdoor celebrations.

Specifications

ASIN	B00X5T5512
Age Range Description	Adult
Best Sellers Rank	#911 in Kitchen & Dining ( See Top 100 in Kitchen & Dining ) #1 in Champagne Glasses
Brand	TOSSWARE
Brand Name	TOSSWARE
Capacity	9 fluid ounces
Color	Clear
Customer Package Type	Standard Packaging
Customer Reviews	4.6 out of 5 stars 9,400 Reviews
Finish Types	Glossy
Global Trade Identification Number	00850949006027
Included Components	9oz Flute
Item Dimensions W x H	2.2"W x 5.8"H
Item Type Name	Premium Quality, Recyclable, Unbreakable & Crystal Clear Plastic Champagne Glasses
Item Weight	9.6 ounces
Manufacturer	TOSSWARE
Manufacturer Part Number	F0101003
Material	Polyethylene Terephthalate (PET)
Material Features	Recyclable
Material Type	Polyethylene Terephthalate (PET)
Material Type Free	BPA Free
Model Number	POP 9oz Flute
Number of Items	1
Occasion	Any Occasion, Birthday, Bridal Shower
Other Special Features of the Product	Stackable,Rounded Rim
Pattern	Solid
Product Care Instructions	Hand Wash Only
Product Style	POP 9oz Flute
Recommended Uses For Product	Restaurant
Reusability	Disposable
Set Name	TOSSWARE POP 9oz Flute Set of 12
Shape	flute
Size	12 Count (9 oz)
Special Feature	Stackable,Rounded Rim
Specific Uses For Product	Cold Drinks
Style	POP 9oz Flute
Theme	Birthday, Wedding
UPC	850949006027
Unit Count	12 Count

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