The 25 best gifts for your sister-in-law that'll cement you as her favorite family member

Owala's water bottle has so many thoughtful features, including a built-in straw and a push-button opening. It's also leakproof and keeps drinks cold for 24 hours. (Read our Deputy Editor's glowing review and you'll be sold.)

She'll never want to take these slippers off. Available in 15 colors, these open-toe slippers will make her morning, evening and post-shower routine even more luxe.

If she's a big coffee or tea drinker, she'll appreciate this smart mug that can keep her drink at the perfect temperature for hours. Before she pours her first cup, she can set her ideal drinking temperature in the Ember app and then adjust as needed.

Whether she's planning a trip or just daydreaming, this book will inspire her to take a vacation. At the very least, it'll encourage her to find adventures in her own backyard.

With Lululemon's viral belt bag, she'll be able to keep her phone, wallet and other essentials close — all while keeping her hands free. Shop the style in 14 colors, including this soft pink shade. 

Because she deserves to sleep like a queen. This set of two satin pillowcases comes in at just $10 and has earned more than 200,000 five-star ratings on Amazon.

This set of two 100% Argentinian pebbled leather pouches is worth the splurge. She can use one to hold beauty products and the other for tech accessories — or whatever else she needs to wrangle.

Quince's cashmere crewneck sweaters are incredibly versatile — not to mention wallet-friendly. The hardest part? Picking between more than 15 color options. 

Treat her to an at-home spa day with this moisturizing bundle, which comes with face masks, under-eye gels and a lip gel. Her dry winter skin will thank you.

Help her find her new signature scent with this fun perfume discovery kit. It even comes with a certificate to redeem for the full-size fragrance of her choice. 

This beaded bag looks so luxe that you'll be surprised to find out it's under $100 Although it comes in a few fun colors, this light pink style is our top pick.

This vegan leather jewelry case will keep her precious pieces safe when she's on the go, and the cute monogram makes this gift feel even more thoughtful.

This gold-plated bubble letter is a fun take on the classic initial pendant. It'll look pretty worn by itself or when layered with other pieces. 

Personalized stationery is such a luxury. Papier has more than 100 designs to choose from, so you're sure to find the ideal notecard set for your sister-in-law.

Everyone loves Laneige — including Sydney Sweeney, its newest ambassador. Your sister-in-law will join the club once she tests out this nourishing lip duo, which comes with a full-size balm and limited-edition overnight mask. 

Lake makes some of the softest pajamas out there. From nightgowns to shorts sets and full-length styles, you can't go wrong when purchasing any of its 100% Peruvian pima cotton styles. 

Glossier — yep, the brand that gave us Boy Brow, Cloud Paint and so much more — also carries home fragrances. This candle has notes of pink pepper, iris and citrus, so not only does it smell fantastic, but the red glass vessel it comes in can be used as decor once you burn the wax all the way down.

Does she love all things skin care? Then introduce her to the wonderful world of Drunk Elephant (on the off chance that she's unfamiliar) with this six-piece set, which includes a vitamin C serum, facial oil and other travel-size wonders.  

Calpak's cosmetics cases are beloved for good reason. Not only do they hold more than you might think, but the clear plastic lets you see exactly what you're looking for and wipes clean.

Upgrade your sister-in-law's body care routine with this trio from Nécessaire. It includes the brand's decadent (and fragrance-free) body wash, body serum and body lotion.

These gold-dipped hoops from Jenny Bird will add a touch of whimsy to any look. You can also nab them in silver.

Chances are she could use a new wallet. This leather and coated canvas design from Coach is a total classic. Plus, it's a serious steal, currently on sale for 65% off.

A fancy hairbrush is the epitome of luxury. This boar bristle brush helps distribute natural oils through hair while stimulating the scalp and detangling knots all at the same time.

Plain sweatshirts without a loud logo or print can be hard to find, but this crewneck from Gilly Hicks is basic in the best way. Shop it in five colors and sizes XXS-XXL.

This quirky picture frame is a great gift, no matter the occasion. Go the extra mile and print out a photo of the two of you together.