Ello Oasis 40 oz Tumbler with Retracting Straw - Leakproof Insulated

In this review of the Ello Oasis 40 oz Tumbler, the bottom line is simple: anyone who wants a large, cup holder-friendly travel cup that reliably keeps drinks cold and actually stays sealed should consider it. The standout feature is the 100% leak-proof lid with hide-a-straw technology, which lets users toss the tumbler in a bag without worrying about spills while keeping the drinking surface clean when not in use. It balances daily convenience with long ice retention for commuters, students, and road-trippers.

Key Features

• 100% Leak-Proof: The innovative retracting straw design prevents spills and lets you carry the tumbler in a bag without mess.
• Hide a Straw Technology: A quick twist tucks the straw away to keep the drinking surface clean and the lid sealed when not sipping.
• Cup Holder Friendly: The tapered shape fits most cup holders so it is practical for commutes, car trips, and deskside use.
• Keeps Cold for Hours: Insulated stainless steel construction helps maintain cold drinks for up to 24 hours, which is handy for long days out.
• Dishwasher Safe: The BPA-free, top-rack dishwasher-safe design makes cleanup straightforward for regular use.
• Stylish Finish: The Sweet Alyssum pattern provides decorative variety without sacrificing the tumbler's practical features.

Who It's For

The Ello Oasis 40 oz is ideal for people who need a large-capacity tumbler for long days away from home: commuters, parents, students, and anyone who values a leakproof solution for a bag or backpack. Its cup-holder-friendly profile and long cold retention make it a sensible choice for road trips and outdoor workdays.

Those who want a very small, ultra-light bottle or who need extreme ruggedness for heavy-duty adventure use may want to look elsewhere, as some users report variable experiences with long-term durability despite many praising the cup quality.

Pros & Cons

Pros

• Reliable leak-proof lid and retracting straw make it bag-safe and mess-free.
• Excellent cold retention keeps beverages chilled for extended periods.
• Design fits most cup holders and is easy to clean on the top dishwasher rack.
• Attractive color and pattern options add personal style to a practical cup.

Cons

• Some users report mixed long-term durability, so heavy or rough use may show wear over time.
• Large 40 oz size might be bulky for minimalist or ultra-light users.

Specifications

Capacity	40 oz
Material	Insulated stainless steel
Lid Type	Retracting straw with leak-proof dial
Dishwasher Safe	Top-rack only, BPA-free
Temperature Performance	Keeps drinks cold up to 24 hours
Design Fit	Cup holder-friendly tapered shape

Our Verdict

The Ello Oasis 40 oz Tumbler is a strong choice for anyone who prioritizes a leakproof, large-capacity cup that keeps drinks cold all day and fits in a car cup holder. It offers thoughtful features like the hide-a-straw lid and dishwasher-safe materials, making it good value for daily commuters and people who want a tidy, reliable travel tumbler.

Frequently Asked Questions

Is the lid really leak-proof?
Yes, the retracting straw and lid dial are designed to create a 100% leak-proof seal when the straw is tucked away.

Can I put the tumbler in the dishwasher?
Yes, the tumbler is BPA-free and designed to be safe on the top rack of the dishwasher for easy cleaning.

How long does it keep drinks cold?
The insulated stainless steel construction is rated to keep drinks cold for up to 24 hours under normal use.