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: SpicyExtreme foods
At a glance
| Product | Claim | Lowest eBay | Amazon |
|---|---|---|---|
 Toxic Waste Hazardously Sour Candy | “Hazardously Sour” | $9.95 | Check price |
| Toxic Waste Nuclear Sludge Chew Bars | see below | none listed | Check price |
 Warheads Extreme Sour Hard Candy | “Extreme Sour” | $10.80 | Check price |
 Warheads Sour Spray | pH 1.6 (2008 review) | $7.95 | Check price |
| Warheads Extreme Sour Smashups | “Extreme Sour”, two flavors | none listed | Check price |
 Final Boss Sour Candy | Levels 1–3 (3 = most sour) | $13.85 | Check price |
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
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.
Warheads Extreme Sour Hard Candy
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
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.
Final Boss Sour Candy
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 WasteCollins Key · YouTube · 2018
▶Extreme Warheads ChallengeRyan's World · YouTube · 2016
▶Warheads Super Sour Spray taste testSekora and Sefari Play · YouTube · 2017Videos open on YouTube. We don't make or endorse them; they show what the challenge looks like.
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Sources
- PR.com: Toxic Waste Hazardously Sour Candy press release
- Wikipedia: Toxic Waste (candy), read 2026-11-09
- Wikipedia: Warheads (candy), read 2026-11-09: “Warheads are known for their unusually intense sour taste.”
- Confectionery News: Final Boss Sour raises $4 million, 2025-05-27