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

Treat her to an at-home spa day with this calming bundle, which comes with sheet masks, undereye patches and lip gels.

An adorable bag for parties and a girls' night out, this Fiona bag is a top seller for Anthropologie. It features glass beads, an inner slip pocket and a magnetic closure.

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

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.

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.

Perfect for various skin types, this set includes four glowy lip balms in different hydrating flavors: Berry, Gummy Bear, Sweet Candy and Vanilla.

If you're not sure what her preferred scent is, get her a sampler set instead. This gift set lets her try eight sample fragrances from popular brands (think Replica, Valentino and Glossier), plus it comes with a redeemable voucher for a travel-size bottle of her favorite. 

The jetsetter would appreciate this six-piece travel-friendly set that can be used morning and night. It comes with cleansers and moisturizers.

Glossier's signature scents also come in candles. Choose from Orange Blossom Neroli, Sandstone and Glossier You.

This cozy sweatshirt comes in sizes 2XS-2XL. It's oversized and super soft, thanks to a cotton polyester blend.

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 cozy 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. It comes available in various sizes to fit most pillows.

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.

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.

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.