photo: Instagram/stila; randco

Happy Amazon Prime Day, everyone! For today and tomorrow, the world's biggest and fastest online retailer is offering somehow ever bigger discounts than usual. And because... well, we're Revelist, we've just dug through tons of beauty deals to find the best and most useful ones you'll want to snag within the next 48 hours.

Behold the best beauty buys from Amazon Prime Day 2019. Happy shopping — and saving.

Revlon Jumbo 3 Barrel Hair Waver for Deep Waves ($18 down from $23)

photo: Amazon

>> Get it here

Curling irons are great, but sometimes a traditional barrel iron creates waves and ringlets that are a little more polished than desired. Get casual waves for more of a bedhead/beach-day look with this wave iron that's even easier and faster to use.

Kitsch Luxury Shower Cap ($18 down from $24)

photo: Amazon

>> Get it here

Whether or not you think they look totally silly, a shower cap is actually a dire necessity for any bathroom —  because shampooing your hair too often is really bad for it, and other times you just can't be bothered to get it wet and start the whole styling process over again. Nab this one at a cheaper price and revel in its comfortable tie front.

La Roche-Posay Effaclar Purifying Foaming Gel Cleanser for Oily Skin ($14 down from $20)

photo: Amazon

>> Get it here

Almost all of La Roche-Posay's staple skin-care products are 25%–30% off for Amazon Prime Day, but we especially recommend this soothing and foaming gel cleanser for anyone who has extra-oily skin right now thanks to summer humidity.

Eos Organic Lip Balm Stick in Vanilla Bean ($6 down from $8)

photo: Amazon

>> Get it here

It's not as if eos' fan-favorite lip balms were all that expensive in the first place, but why not stock up on the brand's extra-portable lip balm sticks while they're all 20% off? Our personal favorite is the vanilla, linked above.

Hot Tools Professional 24K Gold Curling Iron/Wand ($28 down from $40)

photo: Amazon

>> Get it here

You really can't go wrong with a classic! Hot Tools' iconic bestselling 24K curling iron is the end all and be all of heat stylers for anyone who likes old-Hollywood style pin waves and curls. And for the next couple of days only, it comes at a 30% discount.

Stila Stay All Day Liquid Lipstick ($15 down from $22)

photo: Amazon

>> Get it here

Stila is offering 20% on a wide selection of products, and that includes its beloved Stay All Day Liquid Lipstick in 37 shades including Patina (above), Fiery, Tesoro, and Dolce Vita. You might recall this is Alexandria Ocasio-Cortez's favorite lipstick!

Bliss That's Incredi-Peel Glycolic Resurfacing Pads 15-Count ($12 down from $49)

photo: Amazon

>> Get it here

Amazon is offering a straight-up insane discount on these one-use pads that are chock full of glycolic acid, which is a chemical exfoliant known for evening skin tone, lightening dark spots, removing excess oil and dirt, and way more.

Bed Head Blow Out Freak One-Step Volume Booster Dryer ($48 down from $60)

photo: Amazon

>> Get it here

Bed Head's genius tool for drying and straightening hair at the same time is being offered at a very rare 20% discount for Amazon Prime Day. Just imagine the luxury of cutting your entire hair styling routine down to one step! Yes, please.

Glo Skin Beauty Renew Serum ($32 down from $46)

photo: Amazon

>> Get it here

This underrated serum from Glo Skin features powerful amounts of glycolic acid for skin renewal and brightness alongside salicylic acid that fights acne over time. Apply it nightly after cleanser and toner, just before applying moisturizer at bedtime.

R+Co Badlands Dry Shampoo Paste ($21 down from $29)

photo: Amazon

>> Get it here

Yes, you're reading that label correctly — this hair styling product by R+Co serves as a paste and a dry shampoo at the same time. Hair dressers and beauty editors alike rank it as one of the best dry shampoos ever thanks to its lack of aerosol.

Beachwaver Co. S1 Curling Iron ($103 down from $129)

photo: Amazon

>> Get it here

This curling iron might seem pricey, but trust me, it's worth it. The Beachwaver iron is a rotating curling iron that literally does 90% of the work for you. Simply place the tips of your hair into its small clamp, hold down on its rotation button, and your hair will curl itself into the iron.