# Sourest candy you can buy: Toxic Waste, Warheads and the Toxic Waste Challenge

No lab ranks sour candy, so this is a list, in no order, of candies their makers sell on sourness. Toxic Waste's maker calls it "Hazardously Sour", and Warheads are known for an "unusually intense sour taste". A 2008 review measured Warheads Sour Spray at pH 1.6.

**pH 1.6** Warheads Sour Spray (2008 review)

**60 s** to beat the Toxic Waste Challenge

**5** candies to try

The Toxic Waste Challenge is printed on the pack: hold a candy in your mouth for up to 60 seconds, and reach 60 to earn the title "Full Toxie Head". Warheads have their own playground version: a 1999 Wired story described kids holding "sour-offs" to see how many they could eat at once.

 Price tables: [Spicy](https://sharpest.ai/spicy)[Extreme foods](https://sharpest.ai/extreme)

## At a glance

| Product | Claim | Lowest eBay | Amazon |
|---|---|---|---|
| [ Toxic Waste Hazardously Sour Candy](#toxic-waste-hazardously-sour-candy) | “Hazardously Sour” | [$9.95](https://sharpest.ai/go/extreme/toxic-waste-hazardously-sour-candy/v1%7C302200724515%7C0) | [Check price](https://www.amazon.com/s?k=toxic+waste+hazardously+sour+candy&tag=sharpestai-20) |
| [ Toxic Waste Nuclear Sludge Chew Bars](#toxic-waste-nuclear-sludge-chew-bars) | see below | none listed | [Check price](https://www.amazon.com/s?k=toxic+waste+nuclear+sludge+chew+bars&tag=sharpestai-20) |
| [ Warheads Extreme Sour Hard Candy](#warheads-extreme-sour-hard-candy) | “Extreme Sour” | [$10.80](https://sharpest.ai/go/extreme/warheads-extreme-sour-hard-candy/v1%7C358796727241%7C0) | [Check price](https://www.amazon.com/s?k=warheads+extreme+sour+hard+candy&tag=sharpestai-20) |
| [ Warheads Sour Spray](#warheads-sour-spray) | pH 1.6 (2008 review) | [$7.95](https://sharpest.ai/go/extreme/warheads-sour-spray/v1%7C333867982745%7C0) | [Check price](https://www.amazon.com/s?k=warheads+sour+spray&tag=sharpestai-20) |
| [ Warheads Extreme Sour Smashups](#warheads-extreme-sour-smashups) | “Extreme Sour”, two flavors | none listed | [Check price](https://www.amazon.com/s?k=warheads+extreme+sour+smashups&tag=sharpestai-20) |
| [ Final Boss Sour Candy](#final-boss-sour-candy) | Levels 1–3 (3 = most sour) | [$13.85](https://sharpest.ai/go/extreme/final-boss-sour-candy/v1%7C407029652391%7C0) | [Check price](https://www.amazon.com/s?k=final+boss+sour+candy&tag=sharpestai-20) |

## How the Toxic Waste Challenge works

The rules are printed on the Toxic Waste pack:

- Pick one Toxic Waste hard candy.
- Put it in your mouth and start a timer.
- Hold it in your mouth as long as you can, up to 60 seconds.
- Last the full 60 seconds and you earn the title “Full Toxie Head”.

### Do it safely

- The pack warns that eating several pieces in quick succession may cause mouth irritation.
- Rinse with water afterwards: very acidic candy can wear tooth enamel.
- Warheads version: a 1999 Wired story described kids holding “sour-offs” to see how many Warheads they could eat at once. Go slowly.

## The candies

### Toxic Waste Hazardously Sour Candy

 “Hazardously Sour”  [source](https://www.pr.com/press-release/129038)

[eBay $9.95](https://sharpest.ai/go/extreme/toxic-waste-hazardously-sour-candy/v1%7C302200724515%7C0)[Amazon](https://www.amazon.com/s?k=toxic+waste+hazardously+sour+candy&tag=sharpestai-20)

Hard candies with a sour shell and a sour liquid center, sold in the yellow drum. The pack carries the 60-second Toxic Waste Challenge and warns that eating several pieces quickly may irritate your mouth.

### Toxic Waste Nuclear Sludge Chew Bars

 [source](https://en.wikipedia.org/wiki/Toxic_Waste_(candy))

[Amazon](https://www.amazon.com/s?k=toxic+waste+nuclear+sludge+chew+bars&tag=sharpestai-20)

The chewy bar in the Toxic Waste line, sold since 2007 per Wikipedia. Easier to share for a group challenge than the hard candies.

### Warheads Extreme Sour Hard Candy

 “Extreme Sour”  [source](https://en.wikipedia.org/wiki/Warheads_(candy))

[eBay $10.80](https://sharpest.ai/go/extreme/warheads-extreme-sour-hard-candy/v1%7C358796727241%7C0)[Amazon](https://www.amazon.com/s?k=warheads+extreme+sour+hard+candy&tag=sharpestai-20)

The classic: a sour coating that hits first, then a sweet hard candy. Five flavors: watermelon, blue raspberry, lemon, black cherry and green apple.

### Warheads Sour Spray

 pH 1.6 (2008 review)  [source](https://en.wikipedia.org/wiki/Warheads_(candy))

[eBay $7.95](https://sharpest.ai/go/extreme/warheads-sour-spray/v1%7C333867982745%7C0)[Amazon](https://www.amazon.com/s?k=warheads+sour+spray&tag=sharpestai-20)

The most acidic Warheads product we found a measurement for: pH 1.6 in a 2008 review cited by Wikipedia. Spray it straight on your tongue.

### Warheads Extreme Sour Smashups

 “Extreme Sour”, two flavors  [source](https://en.wikipedia.org/wiki/Warheads_(candy))

[Amazon](https://www.amazon.com/s?k=warheads+extreme+sour+smashups&tag=sharpestai-20)

Two Extreme Sour flavors fused in one candy, introduced in 2016.

### Final Boss Sour Candy

 Levels 1–3 (3 = most sour)  [source](https://www.confectionerynews.com/Article/2025/05/27/tiktok-sour-candy-brand-levels-up-with-vc-funding/)

[eBay $13.85](https://sharpest.ai/go/extreme/final-boss-sour-candy/v1%7C407029652391%7C0)[Amazon](https://www.amazon.com/s?k=final+boss+sour+candy&tag=sharpestai-20)

Real dried fruit (mango, kiwi, pineapple, berries) coated in sour, labeled by level, “level one being the least sour and level three being the most,” per Confectionery News. Built inside the Science studio behind Liquid Death and grown on TikTok Shop.

We earn a commission on purchases through these links. eBay prices (item + shipping) read from our latest check; Amazon links open a search, so check the price there. Listed in no particular order. Each figure is the maker’s or the named source’s claim, as of 2026-11-09.

## Good to know

- Sourness claims are the makers' own marketing; the pH figure is from a 2008 review cited by Wikipedia. Very acidic candy can wear tooth enamel, so rinse with water after a challenge.
- Wikipedia pages read 2026-11-09 (Toxic Waste last edited 11 October 2026; Warheads 5 September 2026).

## Watch sour candy challenges

[ ▶**Sourest giant candy challenge: Warheads and Toxic Waste** Collins Key · YouTube · 2018](https://www.youtube.com/watch?v=ecn3sD6pgVI)[ ▶**Extreme Warheads Challenge** Ryan's World · YouTube · 2016](https://www.youtube.com/watch?v=DTDSK36KlIs)[ ▶**Warheads Super Sour Spray taste test** Sekora and Sefari Play · YouTube · 2017](https://www.youtube.com/watch?v=6iaCwnLyRbY)

Videos open on YouTube. We don't make or endorse them; they show what the challenge looks like.

## More extremes

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## Sources

- [PR.com: Toxic Waste Hazardously Sour Candy press release](https://www.pr.com/press-release/129038)
- [Wikipedia: Toxic Waste (candy), read 2026-11-09](https://en.wikipedia.org/wiki/Toxic_Waste_(candy))
- [Wikipedia: Warheads (candy), read 2026-11-09](https://en.wikipedia.org/wiki/Warheads_(candy)): “Warheads are known for their unusually intense sour taste.”
- [Confectionery News: Final Boss Sour raises $4 million, 2025-05-27](https://www.confectionerynews.com/Article/2025/05/27/tiktok-sour-candy-brand-levels-up-with-vc-funding/)

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As of 2026-11-12. Canonical page: https://sharpest.ai/extremes/sourest-candy