Yes, you can put beer in your checked suitcase, and unlike carry-on bags, there is no 3.4-ounce (100ml) limit for alcoholic beverages with an alcohol content below 24% ABV (which includes almost all beers). Per TSA and international airline regulations, there is actually no quantity limit for beverages with less than 24% alcohol in checked luggage, provided you stay within your airline's total baggage weight allowance. The primary concern is not legality, but breakage and leakage. To safely transport beer, you should wrap each can or bottle in bubble wrap or thick clothing, place them in a leak-proof Ziploc bag, and position them in the center of your suitcase surrounded by soft items to absorb the shocks of baggage handling. If you are traveling internationally, be mindful of Customs duty-free limits; for example, the U.S. typically allows 1 liter of alcohol duty-free, while the EU has different allowances. Exceeding these limits won't get the beer confiscated, but you may have to pay a small tax (duty) upon arrival at your destination.